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/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0ed9222-m [2019-01-11 14:10:37,940 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 14:10:37,942 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 14:10:37,954 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 14:10:37,954 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 14:10:37,955 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 14:10:37,957 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 14:10:37,959 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 14:10:37,960 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 14:10:37,961 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 14:10:37,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 14:10:37,987 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 [2019-01-11 14:10:38,001 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 14:10:38,001 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 14:10:38,002 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 14:10:38,002 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 14:10:38,002 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 14:10:38,002 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 14:10:38,003 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 14:10:38,003 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 14:10:38,003 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 14:10:38,003 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 14:10:38,003 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 14:10:38,004 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 14:10:38,004 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 14:10:38,004 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 14:10:38,005 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 14:10:38,005 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 14:10:38,005 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 14:10:38,005 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 14:10:38,006 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 14:10:38,006 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 14:10:38,006 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 14:10:38,006 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 14:10:38,006 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 14:10:38,007 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 14:10:38,007 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 14:10:38,007 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 14:10:38,007 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 14:10:38,007 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 14:10:38,008 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 14:10:38,008 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 14:10:38,008 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 14:10:38,008 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:10:38,009 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 14:10:38,009 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 14:10:38,009 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 14:10:38,009 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 14:10:38,009 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 14:10:38,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 14:10:38,010 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 14:10:38,010 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 14:10:38,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 14:10:38,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 14:10:38,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 14:10:38,057 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 14:10:38,058 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 14:10:38,059 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl [2019-01-11 14:10:38,059 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl' [2019-01-11 14:10:38,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 14:10:38,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 14:10:38,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 14:10:38,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 14:10:38,104 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 14:10:38,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,141 WARN L165 Inliner]: Program contained no entry procedure! [2019-01-11 14:10:38,141 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-01-11 14:10:38,141 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-01-11 14:10:38,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 14:10:38,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 14:10:38,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 14:10:38,158 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 14:10:38,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/1) ... [2019-01-11 14:10:38,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 14:10:38,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 14:10:38,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 14:10:38,180 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 14:10:38,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (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 14:10:38,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-11 14:10:38,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-11 14:10:38,255 INFO L130 BoogieDeclarations]: Found specification of procedure ~malloc [2019-01-11 14:10:38,473 INFO L278 CfgBuilder]: Using library mode [2019-01-11 14:10:38,473 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-11 14:10:38,474 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:10:38 BoogieIcfgContainer [2019-01-11 14:10:38,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 14:10:38,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 14:10:38,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 14:10:38,479 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 14:10:38,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:10:38" (1/2) ... [2019-01-11 14:10:38,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cafaa04 and model type PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:10:38, skipping insertion in model container [2019-01-11 14:10:38,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:10:38" (2/2) ... [2019-01-11 14:10:38,482 INFO L112 eAbstractionObserver]: Analyzing ICFG PointerIncrement-simplified03.bpl [2019-01-11 14:10:38,492 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 14:10:38,500 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-11 14:10:38,516 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-11 14:10:38,548 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 14:10:38,548 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 14:10:38,548 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 14:10:38,549 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 14:10:38,549 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 14:10:38,549 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 14:10:38,549 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 14:10:38,549 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 14:10:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-11 14:10:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:10:38,576 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:38,577 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:10:38,579 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:38,587 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-01-11 14:10:38,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:38,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:38,646 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:38,805 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 14:10:38,808 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:10:38,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:10:38,809 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:10:38,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:10:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:10:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:10:38,836 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-11 14:10:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:38,976 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-01-11 14:10:38,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:10:38,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 14:10:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:38,991 INFO L225 Difference]: With dead ends: 15 [2019-01-11 14:10:38,992 INFO L226 Difference]: Without dead ends: 8 [2019-01-11 14:10:38,995 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 14:10:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-11 14:10:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-01-11 14:10:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-11 14:10:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-01-11 14:10:39,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 3 [2019-01-11 14:10:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:39,030 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-01-11 14:10:39,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:10:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-11 14:10:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-11 14:10:39,031 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:39,031 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-11 14:10:39,032 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 893294860, now seen corresponding path program 1 times [2019-01-11 14:10:39,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:39,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:39,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:39,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:39,151 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:39,152 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-11 14:10:39,154 INFO L207 CegarAbsIntRunner]: [0], [6], [7], [8], [12] [2019-01-11 14:10:39,198 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:10:39,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:10:39,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:10:39,323 INFO L272 AbstractInterpreter]: Visited 5 different actions 17 times. Merged at 4 different actions 12 times. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 3. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:10:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:39,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:10:39,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:39,330 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 14:10:39,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:39,365 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:39,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:39,439 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:39,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:39,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:39,467 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:39,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:39,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:39,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:10:39,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:39,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:10:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:10:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:10:39,727 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-01-11 14:10:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:39,795 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-01-11 14:10:39,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 14:10:39,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-01-11 14:10:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:39,796 INFO L225 Difference]: With dead ends: 12 [2019-01-11 14:10:39,797 INFO L226 Difference]: Without dead ends: 11 [2019-01-11 14:10:39,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:10:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-01-11 14:10:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-01-11 14:10:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-11 14:10:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-01-11 14:10:39,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2019-01-11 14:10:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:39,802 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-01-11 14:10:39,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:10:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-01-11 14:10:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-01-11 14:10:39,803 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:39,804 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1] [2019-01-11 14:10:39,804 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash 529849760, now seen corresponding path program 2 times [2019-01-11 14:10:39,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:39,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:39,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:39,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:39,806 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:39,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:39,939 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:39,939 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:39,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:39,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:39,940 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 14:10:39,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:39,950 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:39,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-11 14:10:39,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:39,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:39,996 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:39,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:40,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:40,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:40,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:40,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:40,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:10:40,496 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:40,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:10:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:10:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:10:40,498 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-01-11 14:10:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:40,643 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-01-11 14:10:40,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:10:40,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-01-11 14:10:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:40,644 INFO L225 Difference]: With dead ends: 15 [2019-01-11 14:10:40,645 INFO L226 Difference]: Without dead ends: 14 [2019-01-11 14:10:40,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:10:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-11 14:10:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-01-11 14:10:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-01-11 14:10:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-01-11 14:10:40,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2019-01-11 14:10:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:40,650 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-01-11 14:10:40,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:10:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-01-11 14:10:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-01-11 14:10:40,651 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:40,651 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1] [2019-01-11 14:10:40,651 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 749428876, now seen corresponding path program 3 times [2019-01-11 14:10:40,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:40,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:40,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:40,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:40,653 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:40,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:40,747 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:40,747 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:40,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:40,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:40,748 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 14:10:40,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:40,761 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:40,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:40,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:40,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:40,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:40,788 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:40,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:40,801 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:40,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:40,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:40,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-11 14:10:40,986 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:40,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:10:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:10:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-11 14:10:40,988 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-01-11 14:10:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:41,316 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-01-11 14:10:41,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:10:41,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-01-11 14:10:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:41,317 INFO L225 Difference]: With dead ends: 18 [2019-01-11 14:10:41,317 INFO L226 Difference]: Without dead ends: 17 [2019-01-11 14:10:41,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-11 14:10:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-01-11 14:10:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-01-11 14:10:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-11 14:10:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-01-11 14:10:41,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2019-01-11 14:10:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:41,323 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-01-11 14:10:41,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:10:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-01-11 14:10:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-01-11 14:10:41,324 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:41,324 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1] [2019-01-11 14:10:41,324 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 995681824, now seen corresponding path program 4 times [2019-01-11 14:10:41,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:41,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:41,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:41,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:41,326 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:41,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:41,437 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:41,437 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:41,438 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:41,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:41,438 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 14:10:41,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:41,455 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:41,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:41,478 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:41,479 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:41,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:41,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:41,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:41,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:41,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-11 14:10:41,705 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:41,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-11 14:10:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-11 14:10:41,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-11 14:10:41,707 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-01-11 14:10:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:41,775 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-01-11 14:10:41,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:10:41,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-01-11 14:10:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:41,779 INFO L225 Difference]: With dead ends: 21 [2019-01-11 14:10:41,779 INFO L226 Difference]: Without dead ends: 20 [2019-01-11 14:10:41,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-11 14:10:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-01-11 14:10:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-01-11 14:10:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-01-11 14:10:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-01-11 14:10:41,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2019-01-11 14:10:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:41,784 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-01-11 14:10:41,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-11 14:10:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-01-11 14:10:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-11 14:10:41,785 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:41,786 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1] [2019-01-11 14:10:41,786 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1313114124, now seen corresponding path program 5 times [2019-01-11 14:10:41,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:41,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:41,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:41,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:41,788 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:41,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:41,910 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:41,910 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:41,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:41,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:41,911 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 14:10:41,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:41,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:41,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-01-11 14:10:41,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:41,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:41,958 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:41,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:41,973 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:41,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:42,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:42,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:42,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-11 14:10:42,294 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:42,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-11 14:10:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-11 14:10:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-11 14:10:42,295 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2019-01-11 14:10:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:42,363 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-01-11 14:10:42,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-11 14:10:42,363 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-01-11 14:10:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:42,364 INFO L225 Difference]: With dead ends: 24 [2019-01-11 14:10:42,364 INFO L226 Difference]: Without dead ends: 23 [2019-01-11 14:10:42,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-11 14:10:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-01-11 14:10:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-01-11 14:10:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-11 14:10:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-01-11 14:10:42,370 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2019-01-11 14:10:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:42,370 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-01-11 14:10:42,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-11 14:10:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-01-11 14:10:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-01-11 14:10:42,371 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:42,371 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1] [2019-01-11 14:10:42,372 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash 420777632, now seen corresponding path program 6 times [2019-01-11 14:10:42,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:42,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:42,373 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:42,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:42,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:42,557 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:42,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:42,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:42,558 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:42,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:42,573 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:42,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:42,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:42,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:42,593 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:42,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:42,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:42,609 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:42,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:42,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:42,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-01-11 14:10:42,840 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:42,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-01-11 14:10:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-01-11 14:10:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-11 14:10:42,841 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-01-11 14:10:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:42,911 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-01-11 14:10:42,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-11 14:10:42,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-01-11 14:10:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:42,913 INFO L225 Difference]: With dead ends: 27 [2019-01-11 14:10:42,914 INFO L226 Difference]: Without dead ends: 26 [2019-01-11 14:10:42,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-11 14:10:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-01-11 14:10:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-01-11 14:10:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-11 14:10:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-01-11 14:10:42,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2019-01-11 14:10:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:42,920 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-01-11 14:10:42,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-01-11 14:10:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-01-11 14:10:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-01-11 14:10:42,920 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:42,921 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1] [2019-01-11 14:10:42,921 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1623060596, now seen corresponding path program 7 times [2019-01-11 14:10:42,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:42,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:42,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:42,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:42,925 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:43,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:43,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:43,089 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:43,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:43,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:43,090 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:43,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:43,099 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:43,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:43,129 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:43,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:43,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:43,182 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:43,325 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:43,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:43,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2019-01-11 14:10:43,487 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:43,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-01-11 14:10:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-01-11 14:10:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-11 14:10:43,490 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 18 states. [2019-01-11 14:10:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:43,656 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-01-11 14:10:43,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-11 14:10:43,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-01-11 14:10:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:43,657 INFO L225 Difference]: With dead ends: 30 [2019-01-11 14:10:43,658 INFO L226 Difference]: Without dead ends: 29 [2019-01-11 14:10:43,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-11 14:10:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-01-11 14:10:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-01-11 14:10:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-01-11 14:10:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-01-11 14:10:43,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2019-01-11 14:10:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:43,664 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-01-11 14:10:43,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-01-11 14:10:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-01-11 14:10:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-01-11 14:10:43,665 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:43,665 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1] [2019-01-11 14:10:43,665 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 143644448, now seen corresponding path program 8 times [2019-01-11 14:10:43,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:43,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:43,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:43,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:43,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:43,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:43,808 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:43,808 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:43,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:43,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:43,809 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:43,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:43,828 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:43,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-01-11 14:10:43,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:43,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:43,871 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:43,872 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:43,884 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:43,885 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:43,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:44,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:44,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-01-11 14:10:44,179 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-01-11 14:10:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-01-11 14:10:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-11 14:10:44,180 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-01-11 14:10:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:44,301 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-01-11 14:10:44,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-11 14:10:44,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-01-11 14:10:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:44,303 INFO L225 Difference]: With dead ends: 33 [2019-01-11 14:10:44,303 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 14:10:44,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-11 14:10:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 14:10:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-11 14:10:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 14:10:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-01-11 14:10:44,308 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2019-01-11 14:10:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:44,309 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-01-11 14:10:44,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-01-11 14:10:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-01-11 14:10:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-01-11 14:10:44,310 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:44,310 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1] [2019-01-11 14:10:44,310 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1524365068, now seen corresponding path program 9 times [2019-01-11 14:10:44,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:44,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:44,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:44,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:44,312 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:44,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:44,534 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:44,535 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:44,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:44,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:44,535 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:44,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:44,545 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:44,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:44,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:44,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:44,566 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:44,566 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:44,576 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:44,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:44,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:45,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:45,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2019-01-11 14:10:45,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-01-11 14:10:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-01-11 14:10:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-11 14:10:45,355 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2019-01-11 14:10:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:45,453 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-01-11 14:10:45,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-11 14:10:45,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-01-11 14:10:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:45,455 INFO L225 Difference]: With dead ends: 36 [2019-01-11 14:10:45,455 INFO L226 Difference]: Without dead ends: 35 [2019-01-11 14:10:45,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-11 14:10:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-01-11 14:10:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-01-11 14:10:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-11 14:10:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-01-11 14:10:45,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2019-01-11 14:10:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:45,462 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-01-11 14:10:45,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-01-11 14:10:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-01-11 14:10:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-01-11 14:10:45,463 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:45,463 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1] [2019-01-11 14:10:45,463 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561696, now seen corresponding path program 10 times [2019-01-11 14:10:45,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:45,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:45,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:45,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:45,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:45,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:45,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:45,711 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:45,711 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:45,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:45,711 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:45,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:45,721 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:45,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:45,768 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:45,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:45,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:45,869 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:46,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:46,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:46,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2019-01-11 14:10:46,373 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-01-11 14:10:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-01-11 14:10:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-11 14:10:46,374 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 24 states. [2019-01-11 14:10:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:46,466 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-01-11 14:10:46,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-11 14:10:46,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2019-01-11 14:10:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:46,469 INFO L225 Difference]: With dead ends: 39 [2019-01-11 14:10:46,469 INFO L226 Difference]: Without dead ends: 38 [2019-01-11 14:10:46,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-11 14:10:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-11 14:10:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-01-11 14:10:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 14:10:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-01-11 14:10:46,475 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2019-01-11 14:10:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:46,475 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-01-11 14:10:46,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-01-11 14:10:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-01-11 14:10:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-01-11 14:10:46,477 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:46,477 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1] [2019-01-11 14:10:46,477 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1917468300, now seen corresponding path program 11 times [2019-01-11 14:10:46,478 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:46,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:46,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:46,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:46,479 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:46,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:46,683 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:46,683 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:46,683 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:46,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:46,683 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:46,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:46,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:46,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-01-11 14:10:46,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:46,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:46,780 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:46,780 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:46,795 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:46,796 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:46,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:47,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:47,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2019-01-11 14:10:47,283 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:47,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-01-11 14:10:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-01-11 14:10:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-11 14:10:47,284 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 26 states. [2019-01-11 14:10:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:47,364 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-01-11 14:10:47,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-11 14:10:47,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2019-01-11 14:10:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:47,366 INFO L225 Difference]: With dead ends: 42 [2019-01-11 14:10:47,366 INFO L226 Difference]: Without dead ends: 41 [2019-01-11 14:10:47,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-11 14:10:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-01-11 14:10:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-01-11 14:10:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-11 14:10:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-01-11 14:10:47,372 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2019-01-11 14:10:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:47,372 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-01-11 14:10:47,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-01-11 14:10:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-01-11 14:10:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-01-11 14:10:47,373 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:47,373 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1] [2019-01-11 14:10:47,374 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash 233130016, now seen corresponding path program 12 times [2019-01-11 14:10:47,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:47,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:47,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:47,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:47,375 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:47,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:47,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:47,576 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:47,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:47,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:47,577 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:47,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:47,585 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:47,606 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:47,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:47,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:47,629 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:47,630 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:47,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:47,643 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:47,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:48,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:48,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-01-11 14:10:48,196 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:48,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-01-11 14:10:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-01-11 14:10:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-11 14:10:48,198 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 28 states. [2019-01-11 14:10:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:48,281 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-01-11 14:10:48,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-01-11 14:10:48,281 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2019-01-11 14:10:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:48,282 INFO L225 Difference]: With dead ends: 45 [2019-01-11 14:10:48,283 INFO L226 Difference]: Without dead ends: 44 [2019-01-11 14:10:48,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-11 14:10:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-01-11 14:10:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-01-11 14:10:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-11 14:10:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-01-11 14:10:48,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2019-01-11 14:10:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:48,289 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-01-11 14:10:48,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-01-11 14:10:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-01-11 14:10:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-01-11 14:10:48,290 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:48,290 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1] [2019-01-11 14:10:48,290 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 214230540, now seen corresponding path program 13 times [2019-01-11 14:10:48,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:48,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:48,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:48,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:48,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:48,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:48,519 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:48,520 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:48,520 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:48,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:48,520 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:48,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:48,529 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:48,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:48,553 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:48,554 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:48,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:48,558 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:48,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:49,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:49,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2019-01-11 14:10:49,644 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:49,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-01-11 14:10:49,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-01-11 14:10:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-11 14:10:49,645 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 30 states. [2019-01-11 14:10:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:49,774 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-01-11 14:10:49,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-11 14:10:49,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2019-01-11 14:10:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:49,776 INFO L225 Difference]: With dead ends: 48 [2019-01-11 14:10:49,776 INFO L226 Difference]: Without dead ends: 47 [2019-01-11 14:10:49,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-11 14:10:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-11 14:10:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-01-11 14:10:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-01-11 14:10:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-01-11 14:10:49,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2019-01-11 14:10:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:49,784 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-01-11 14:10:49,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-01-11 14:10:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-01-11 14:10:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-01-11 14:10:49,785 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:49,785 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1] [2019-01-11 14:10:49,786 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -179343200, now seen corresponding path program 14 times [2019-01-11 14:10:49,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:49,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:49,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:49,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:49,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:50,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:50,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:50,160 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:50,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:50,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:50,161 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:50,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:50,174 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:50,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-01-11 14:10:50,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:50,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:50,267 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:50,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:50,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:50,282 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:50,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:51,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:51,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-01-11 14:10:51,211 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:51,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-01-11 14:10:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-01-11 14:10:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-11 14:10:51,213 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 32 states. [2019-01-11 14:10:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:51,441 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-01-11 14:10:51,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-01-11 14:10:51,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-01-11 14:10:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:51,442 INFO L225 Difference]: With dead ends: 51 [2019-01-11 14:10:51,443 INFO L226 Difference]: Without dead ends: 50 [2019-01-11 14:10:51,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-11 14:10:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-01-11 14:10:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-01-11 14:10:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-01-11 14:10:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-01-11 14:10:51,459 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2019-01-11 14:10:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:51,460 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-01-11 14:10:51,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-01-11 14:10:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-01-11 14:10:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-01-11 14:10:51,461 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:51,461 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1] [2019-01-11 14:10:51,461 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 126086540, now seen corresponding path program 15 times [2019-01-11 14:10:51,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:51,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:51,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:51,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:51,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:51,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:51,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:51,811 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:51,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:51,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:51,812 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:51,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:51,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:51,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:51,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:51,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:51,853 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:51,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:51,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:51,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:52,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:52,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:52,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2019-01-11 14:10:52,439 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:52,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-01-11 14:10:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-01-11 14:10:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-11 14:10:52,440 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 34 states. [2019-01-11 14:10:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:52,542 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-01-11 14:10:52,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-01-11 14:10:52,543 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2019-01-11 14:10:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:52,543 INFO L225 Difference]: With dead ends: 54 [2019-01-11 14:10:52,543 INFO L226 Difference]: Without dead ends: 53 [2019-01-11 14:10:52,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-11 14:10:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-01-11 14:10:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-01-11 14:10:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-11 14:10:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-01-11 14:10:52,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2019-01-11 14:10:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:52,550 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-01-11 14:10:52,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-01-11 14:10:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-01-11 14:10:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-01-11 14:10:52,551 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:52,552 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1] [2019-01-11 14:10:52,552 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1852229344, now seen corresponding path program 16 times [2019-01-11 14:10:52,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:52,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:52,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:52,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:52,553 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:52,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:52,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:52,915 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:52,915 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:52,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:52,916 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:52,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:52,924 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:52,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:52,953 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:52,953 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:52,963 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:52,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:53,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:55,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:55,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2019-01-11 14:10:55,194 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:55,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-01-11 14:10:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-01-11 14:10:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-11 14:10:55,196 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 36 states. [2019-01-11 14:10:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:55,323 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-01-11 14:10:55,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-01-11 14:10:55,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-01-11 14:10:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:55,325 INFO L225 Difference]: With dead ends: 57 [2019-01-11 14:10:55,325 INFO L226 Difference]: Without dead ends: 56 [2019-01-11 14:10:55,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-11 14:10:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-11 14:10:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-01-11 14:10:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-01-11 14:10:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-01-11 14:10:55,331 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2019-01-11 14:10:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:55,331 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-01-11 14:10:55,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-01-11 14:10:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-01-11 14:10:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-01-11 14:10:55,332 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:55,333 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1] [2019-01-11 14:10:55,333 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1975473420, now seen corresponding path program 17 times [2019-01-11 14:10:55,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:55,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:55,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:55,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:55,813 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:55,813 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:55,814 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:55,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:55,814 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:55,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:10:55,822 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:10:55,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-01-11 14:10:55,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:55,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:55,865 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:55,865 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:55,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:55,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:56,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:56,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:56,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2019-01-11 14:10:56,605 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:56,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-01-11 14:10:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-01-11 14:10:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-11 14:10:56,606 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 38 states. [2019-01-11 14:10:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:56,720 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-01-11 14:10:56,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-01-11 14:10:56,720 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 54 [2019-01-11 14:10:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:56,721 INFO L225 Difference]: With dead ends: 60 [2019-01-11 14:10:56,721 INFO L226 Difference]: Without dead ends: 59 [2019-01-11 14:10:56,723 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-11 14:10:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-01-11 14:10:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-01-11 14:10:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-01-11 14:10:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-01-11 14:10:56,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2019-01-11 14:10:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:56,728 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-01-11 14:10:56,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-01-11 14:10:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-01-11 14:10:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-01-11 14:10:56,729 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:56,729 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1] [2019-01-11 14:10:56,729 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1686806944, now seen corresponding path program 18 times [2019-01-11 14:10:56,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:56,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:56,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:56,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:56,731 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:57,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:57,601 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:57,601 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:57,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:57,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:57,601 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:57,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:10:57,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:10:57,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:10:57,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:10:57,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:57,661 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:57,662 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:57,668 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:57,669 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:57,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:10:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:58,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:10:58,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2019-01-11 14:10:58,606 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:10:58,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-01-11 14:10:58,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-01-11 14:10:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-11 14:10:58,608 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 40 states. [2019-01-11 14:10:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:10:58,726 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-01-11 14:10:58,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-01-11 14:10:58,726 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 57 [2019-01-11 14:10:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:10:58,727 INFO L225 Difference]: With dead ends: 63 [2019-01-11 14:10:58,727 INFO L226 Difference]: Without dead ends: 62 [2019-01-11 14:10:58,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-11 14:10:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-11 14:10:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-01-11 14:10:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-11 14:10:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-01-11 14:10:58,733 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2019-01-11 14:10:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:10:58,733 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-01-11 14:10:58,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-01-11 14:10:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-01-11 14:10:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-01-11 14:10:58,734 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:10:58,734 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1] [2019-01-11 14:10:58,734 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:10:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:10:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 548347020, now seen corresponding path program 19 times [2019-01-11 14:10:58,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:10:58,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:58,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:10:58,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:10:58,736 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:10:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:59,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:59,519 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:10:59,519 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:10:59,519 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:10:59,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:10:59,519 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:10:59,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:10:59,528 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:10:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:10:59,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:10:59,554 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:10:59,554 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:10:59,563 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:10:59,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:10:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:10:59,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:00,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:00,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2019-01-11 14:11:00,375 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:00,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-01-11 14:11:00,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-01-11 14:11:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-11 14:11:00,377 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 42 states. [2019-01-11 14:11:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:00,533 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-01-11 14:11:00,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-01-11 14:11:00,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2019-01-11 14:11:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:00,534 INFO L225 Difference]: With dead ends: 66 [2019-01-11 14:11:00,535 INFO L226 Difference]: Without dead ends: 65 [2019-01-11 14:11:00,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-11 14:11:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-11 14:11:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-01-11 14:11:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-01-11 14:11:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-01-11 14:11:00,540 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2019-01-11 14:11:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:00,540 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-01-11 14:11:00,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-01-11 14:11:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-01-11 14:11:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-01-11 14:11:00,541 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:00,541 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1] [2019-01-11 14:11:00,542 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2045487648, now seen corresponding path program 20 times [2019-01-11 14:11:00,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:00,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:00,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:00,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:00,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:01,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:01,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:01,117 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:01,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:01,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:01,117 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:01,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:01,132 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:01,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-01-11 14:11:01,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:01,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:01,193 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:01,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:01,209 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:01,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:01,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:02,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:02,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2019-01-11 14:11:02,304 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:02,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-01-11 14:11:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-01-11 14:11:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-11 14:11:02,306 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 44 states. [2019-01-11 14:11:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:02,430 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-01-11 14:11:02,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-01-11 14:11:02,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-01-11 14:11:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:02,431 INFO L225 Difference]: With dead ends: 69 [2019-01-11 14:11:02,431 INFO L226 Difference]: Without dead ends: 68 [2019-01-11 14:11:02,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-11 14:11:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-01-11 14:11:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-01-11 14:11:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-01-11 14:11:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-01-11 14:11:02,437 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2019-01-11 14:11:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:02,437 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-01-11 14:11:02,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-01-11 14:11:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-01-11 14:11:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-01-11 14:11:02,438 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:02,439 INFO L402 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1] [2019-01-11 14:11:02,439 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 126567436, now seen corresponding path program 21 times [2019-01-11 14:11:02,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:02,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:02,440 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:03,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:03,081 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:03,081 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:03,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:03,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:03,081 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:03,094 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:03,094 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:03,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:03,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:03,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:03,152 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:03,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:03,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:03,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:03,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:04,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:04,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2019-01-11 14:11:04,235 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:04,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-01-11 14:11:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-01-11 14:11:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-11 14:11:04,237 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 46 states. [2019-01-11 14:11:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:04,372 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-01-11 14:11:04,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-01-11 14:11:04,375 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2019-01-11 14:11:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:04,376 INFO L225 Difference]: With dead ends: 72 [2019-01-11 14:11:04,376 INFO L226 Difference]: Without dead ends: 71 [2019-01-11 14:11:04,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-11 14:11:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-11 14:11:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-01-11 14:11:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-01-11 14:11:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-01-11 14:11:04,380 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2019-01-11 14:11:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:04,380 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-01-11 14:11:04,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-01-11 14:11:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-01-11 14:11:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-01-11 14:11:04,381 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:04,381 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1] [2019-01-11 14:11:04,381 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash -410758496, now seen corresponding path program 22 times [2019-01-11 14:11:04,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:04,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:04,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:04,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:04,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:04,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:04,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:04,788 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:04,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:04,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:04,789 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:04,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:04,797 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:04,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:04,836 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:04,837 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:04,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:04,844 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:05,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:06,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:06,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2019-01-11 14:11:06,134 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:06,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-01-11 14:11:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-01-11 14:11:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-11 14:11:06,136 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 48 states. [2019-01-11 14:11:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:06,310 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-01-11 14:11:06,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-01-11 14:11:06,311 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 69 [2019-01-11 14:11:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:06,312 INFO L225 Difference]: With dead ends: 75 [2019-01-11 14:11:06,312 INFO L226 Difference]: Without dead ends: 74 [2019-01-11 14:11:06,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-11 14:11:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-01-11 14:11:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-01-11 14:11:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-01-11 14:11:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-01-11 14:11:06,317 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2019-01-11 14:11:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:06,317 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-01-11 14:11:06,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-01-11 14:11:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-01-11 14:11:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-01-11 14:11:06,318 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:06,318 INFO L402 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1] [2019-01-11 14:11:06,319 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:06,319 INFO L82 PathProgramCache]: Analyzing trace with hash -544486516, now seen corresponding path program 23 times [2019-01-11 14:11:06,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:06,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:06,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:06,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:06,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:06,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:06,728 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:06,728 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:06,728 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:06,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:06,728 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:06,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:06,738 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:06,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-01-11 14:11:06,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:06,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:06,790 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:06,790 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:06,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:06,813 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:07,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:08,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:08,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2019-01-11 14:11:08,028 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:08,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-01-11 14:11:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-01-11 14:11:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-11 14:11:08,029 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 50 states. [2019-01-11 14:11:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:08,187 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-01-11 14:11:08,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-01-11 14:11:08,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 72 [2019-01-11 14:11:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:08,200 INFO L225 Difference]: With dead ends: 78 [2019-01-11 14:11:08,200 INFO L226 Difference]: Without dead ends: 77 [2019-01-11 14:11:08,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-11 14:11:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-11 14:11:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-01-11 14:11:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-01-11 14:11:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-01-11 14:11:08,205 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2019-01-11 14:11:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:08,206 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-01-11 14:11:08,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-01-11 14:11:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-01-11 14:11:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-01-11 14:11:08,207 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:08,207 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1] [2019-01-11 14:11:08,207 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1293720352, now seen corresponding path program 24 times [2019-01-11 14:11:08,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:08,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:08,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:08,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:08,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:08,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:08,593 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:08,593 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:08,593 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:08,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:08,593 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:08,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:08,601 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:08,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:08,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:08,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:08,648 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:08,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:08,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:08,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:09,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:09,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:09,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2019-01-11 14:11:09,932 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:09,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-01-11 14:11:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-01-11 14:11:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-11 14:11:09,934 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 52 states. [2019-01-11 14:11:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:10,111 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-01-11 14:11:10,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-01-11 14:11:10,112 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 75 [2019-01-11 14:11:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:10,113 INFO L225 Difference]: With dead ends: 81 [2019-01-11 14:11:10,113 INFO L226 Difference]: Without dead ends: 80 [2019-01-11 14:11:10,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-11 14:11:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-11 14:11:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-01-11 14:11:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-01-11 14:11:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-01-11 14:11:10,118 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2019-01-11 14:11:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:10,118 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-01-11 14:11:10,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-01-11 14:11:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-01-11 14:11:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-01-11 14:11:10,119 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:10,119 INFO L402 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1] [2019-01-11 14:11:10,120 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:10,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1813466356, now seen corresponding path program 25 times [2019-01-11 14:11:10,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:10,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:10,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:10,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:10,121 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:10,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:10,560 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:10,560 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:10,560 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:10,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:10,560 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:10,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:10,569 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:10,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:10,598 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:10,598 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:10,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:10,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:11,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:12,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:12,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2019-01-11 14:11:12,196 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:12,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-01-11 14:11:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-01-11 14:11:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-11 14:11:12,197 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 54 states. [2019-01-11 14:11:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:12,388 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-01-11 14:11:12,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-01-11 14:11:12,389 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 78 [2019-01-11 14:11:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:12,390 INFO L225 Difference]: With dead ends: 84 [2019-01-11 14:11:12,390 INFO L226 Difference]: Without dead ends: 83 [2019-01-11 14:11:12,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-11 14:11:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-01-11 14:11:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-01-11 14:11:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-01-11 14:11:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-01-11 14:11:12,394 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2019-01-11 14:11:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:12,394 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-01-11 14:11:12,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-01-11 14:11:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-01-11 14:11:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-01-11 14:11:12,395 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:12,395 INFO L402 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1] [2019-01-11 14:11:12,396 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:12,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1417446304, now seen corresponding path program 26 times [2019-01-11 14:11:12,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:12,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:12,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:12,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:12,397 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:12,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:12,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:12,834 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:12,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:12,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:12,834 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:12,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:12,843 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:12,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-01-11 14:11:12,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:12,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:12,906 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:12,906 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:12,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:12,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:13,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:14,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:14,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2019-01-11 14:11:14,558 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:14,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-01-11 14:11:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-01-11 14:11:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-11 14:11:14,560 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 56 states. [2019-01-11 14:11:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:14,722 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-01-11 14:11:14,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-01-11 14:11:14,722 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 81 [2019-01-11 14:11:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:14,723 INFO L225 Difference]: With dead ends: 87 [2019-01-11 14:11:14,724 INFO L226 Difference]: Without dead ends: 86 [2019-01-11 14:11:14,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-11 14:11:14,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-01-11 14:11:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-01-11 14:11:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-01-11 14:11:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-01-11 14:11:14,729 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2019-01-11 14:11:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:14,729 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-01-11 14:11:14,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-01-11 14:11:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-01-11 14:11:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-01-11 14:11:14,730 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:14,730 INFO L402 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1] [2019-01-11 14:11:14,730 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -975570292, now seen corresponding path program 27 times [2019-01-11 14:11:14,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:14,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:14,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:14,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:14,731 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:15,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:15,212 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:15,212 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:15,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:15,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:15,212 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:15,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:15,223 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:15,248 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:15,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:15,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:15,254 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:15,254 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:15,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:15,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:15,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:17,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:17,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 84 [2019-01-11 14:11:17,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:17,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-01-11 14:11:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-01-11 14:11:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-11 14:11:17,089 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 58 states. [2019-01-11 14:11:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:17,260 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-01-11 14:11:17,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-01-11 14:11:17,260 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 84 [2019-01-11 14:11:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:17,261 INFO L225 Difference]: With dead ends: 90 [2019-01-11 14:11:17,262 INFO L226 Difference]: Without dead ends: 89 [2019-01-11 14:11:17,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-11 14:11:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-11 14:11:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-01-11 14:11:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-01-11 14:11:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-01-11 14:11:17,267 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2019-01-11 14:11:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:17,267 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-01-11 14:11:17,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-01-11 14:11:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-01-11 14:11:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-01-11 14:11:17,268 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:17,268 INFO L402 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1] [2019-01-11 14:11:17,269 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 829164576, now seen corresponding path program 28 times [2019-01-11 14:11:17,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:17,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:17,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:17,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:17,270 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:17,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:17,976 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:17,976 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:17,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:17,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:17,976 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:17,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:17,985 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:18,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:18,022 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:18,023 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:18,031 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:18,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:18,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:19,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:19,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2019-01-11 14:11:19,886 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:19,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-01-11 14:11:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-01-11 14:11:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-11 14:11:19,888 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 60 states. [2019-01-11 14:11:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:20,100 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-01-11 14:11:20,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-01-11 14:11:20,102 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 87 [2019-01-11 14:11:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:20,103 INFO L225 Difference]: With dead ends: 93 [2019-01-11 14:11:20,103 INFO L226 Difference]: Without dead ends: 92 [2019-01-11 14:11:20,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-11 14:11:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-01-11 14:11:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-01-11 14:11:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-11 14:11:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-01-11 14:11:20,108 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2019-01-11 14:11:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:20,108 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-01-11 14:11:20,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-01-11 14:11:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-01-11 14:11:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-01-11 14:11:20,109 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:20,109 INFO L402 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1] [2019-01-11 14:11:20,109 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1285005836, now seen corresponding path program 29 times [2019-01-11 14:11:20,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:20,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:20,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:20,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:20,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:20,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:20,664 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:20,665 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:20,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:20,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:20,665 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:20,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:20,678 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:20,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-01-11 14:11:20,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:20,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:20,764 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:20,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:20,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:20,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:21,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:22,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:22,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 90 [2019-01-11 14:11:22,775 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:22,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-01-11 14:11:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-01-11 14:11:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-11 14:11:22,776 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 62 states. [2019-01-11 14:11:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:22,966 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-01-11 14:11:22,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-01-11 14:11:22,967 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 90 [2019-01-11 14:11:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:22,968 INFO L225 Difference]: With dead ends: 96 [2019-01-11 14:11:22,968 INFO L226 Difference]: Without dead ends: 95 [2019-01-11 14:11:22,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-11 14:11:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-11 14:11:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-01-11 14:11:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-01-11 14:11:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-01-11 14:11:22,973 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2019-01-11 14:11:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:22,973 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-01-11 14:11:22,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-01-11 14:11:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-01-11 14:11:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-01-11 14:11:22,974 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:22,974 INFO L402 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1] [2019-01-11 14:11:22,974 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash 565392544, now seen corresponding path program 30 times [2019-01-11 14:11:22,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:22,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:22,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:22,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:22,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:23,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:23,561 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:23,561 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:23,561 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:23,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:23,561 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:23,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:23,571 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:23,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:23,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:23,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:23,615 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:23,615 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:23,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:23,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:24,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:25,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:25,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 93 [2019-01-11 14:11:25,635 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:25,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-01-11 14:11:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-01-11 14:11:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-11 14:11:25,636 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 64 states. [2019-01-11 14:11:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:25,824 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-01-11 14:11:25,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-01-11 14:11:25,825 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 93 [2019-01-11 14:11:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:25,826 INFO L225 Difference]: With dead ends: 99 [2019-01-11 14:11:25,826 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 14:11:25,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-11 14:11:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 14:11:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-01-11 14:11:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-01-11 14:11:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-01-11 14:11:25,831 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2019-01-11 14:11:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:25,831 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-01-11 14:11:25,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-01-11 14:11:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-01-11 14:11:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-01-11 14:11:25,832 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:25,832 INFO L402 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1] [2019-01-11 14:11:25,832 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:25,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1252415092, now seen corresponding path program 31 times [2019-01-11 14:11:25,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:25,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:25,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:26,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:26,750 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:26,751 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:26,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:26,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:26,751 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:26,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:26,759 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:26,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:26,808 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:26,808 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:26,822 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:26,823 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:27,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:28,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:28,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 96 [2019-01-11 14:11:28,795 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:28,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-01-11 14:11:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-01-11 14:11:28,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-11 14:11:28,797 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 66 states. [2019-01-11 14:11:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:29,013 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-01-11 14:11:29,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-01-11 14:11:29,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 96 [2019-01-11 14:11:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:29,015 INFO L225 Difference]: With dead ends: 102 [2019-01-11 14:11:29,015 INFO L226 Difference]: Without dead ends: 101 [2019-01-11 14:11:29,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-11 14:11:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-11 14:11:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-01-11 14:11:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-01-11 14:11:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-01-11 14:11:29,021 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2019-01-11 14:11:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:29,021 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-01-11 14:11:29,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-01-11 14:11:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-01-11 14:11:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-01-11 14:11:29,022 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:29,022 INFO L402 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1] [2019-01-11 14:11:29,022 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -317063904, now seen corresponding path program 32 times [2019-01-11 14:11:29,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:29,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:29,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:29,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:29,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:29,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:29,637 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:29,638 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:29,638 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:29,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:29,638 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:29,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:29,646 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:29,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-01-11 14:11:29,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:29,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:29,735 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:29,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:29,745 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:29,745 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:30,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:32,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:32,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-01-11 14:11:32,283 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:32,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-01-11 14:11:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-01-11 14:11:32,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-11 14:11:32,284 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 68 states. [2019-01-11 14:11:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:32,527 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-01-11 14:11:32,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-01-11 14:11:32,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 99 [2019-01-11 14:11:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:32,528 INFO L225 Difference]: With dead ends: 105 [2019-01-11 14:11:32,528 INFO L226 Difference]: Without dead ends: 104 [2019-01-11 14:11:32,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-11 14:11:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-11 14:11:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-01-11 14:11:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-11 14:11:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-01-11 14:11:32,535 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2019-01-11 14:11:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:32,535 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-01-11 14:11:32,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-01-11 14:11:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-01-11 14:11:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-01-11 14:11:32,536 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:32,536 INFO L402 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1] [2019-01-11 14:11:32,536 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1017638644, now seen corresponding path program 33 times [2019-01-11 14:11:32,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:32,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:32,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:32,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:32,537 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:33,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:33,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:33,428 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:33,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:33,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:33,428 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:33,436 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:33,436 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:33,471 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:33,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:33,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:33,494 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:33,495 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:33,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:33,542 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:34,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:35,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:35,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 102 [2019-01-11 14:11:35,947 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:35,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-01-11 14:11:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-01-11 14:11:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-11 14:11:35,949 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 70 states. [2019-01-11 14:11:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:36,167 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-01-11 14:11:36,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-01-11 14:11:36,168 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 102 [2019-01-11 14:11:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:36,169 INFO L225 Difference]: With dead ends: 108 [2019-01-11 14:11:36,169 INFO L226 Difference]: Without dead ends: 107 [2019-01-11 14:11:36,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-11 14:11:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-11 14:11:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-01-11 14:11:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-01-11 14:11:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-01-11 14:11:36,174 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 102 [2019-01-11 14:11:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:36,175 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-01-11 14:11:36,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-01-11 14:11:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-01-11 14:11:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-01-11 14:11:36,175 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:36,175 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1] [2019-01-11 14:11:36,175 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1701340576, now seen corresponding path program 34 times [2019-01-11 14:11:36,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:36,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:36,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:36,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:36,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:37,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:37,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:37,576 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:37,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:37,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:37,576 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:37,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:37,584 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:37,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:37,623 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:37,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:37,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:37,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:38,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:39,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:39,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2019-01-11 14:11:39,949 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:39,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-01-11 14:11:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-01-11 14:11:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-11 14:11:39,951 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 72 states. [2019-01-11 14:11:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:40,156 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-01-11 14:11:40,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-01-11 14:11:40,157 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 105 [2019-01-11 14:11:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:40,158 INFO L225 Difference]: With dead ends: 111 [2019-01-11 14:11:40,158 INFO L226 Difference]: Without dead ends: 110 [2019-01-11 14:11:40,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-11 14:11:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-01-11 14:11:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-01-11 14:11:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-11 14:11:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-01-11 14:11:40,162 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 105 [2019-01-11 14:11:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:40,162 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-01-11 14:11:40,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-01-11 14:11:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-01-11 14:11:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-01-11 14:11:40,163 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:40,163 INFO L402 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1] [2019-01-11 14:11:40,163 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash -271918964, now seen corresponding path program 35 times [2019-01-11 14:11:40,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:40,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:40,165 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:40,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:40,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:40,878 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:40,878 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:40,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:40,878 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:40,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:40,887 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:40,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-01-11 14:11:40,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:40,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:40,987 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:40,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:40,996 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:40,996 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:42,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:43,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:43,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2019-01-11 14:11:43,642 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:43,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-01-11 14:11:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-01-11 14:11:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-11 14:11:43,643 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 74 states. [2019-01-11 14:11:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:43,943 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-01-11 14:11:43,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-01-11 14:11:43,944 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 108 [2019-01-11 14:11:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:43,945 INFO L225 Difference]: With dead ends: 114 [2019-01-11 14:11:43,945 INFO L226 Difference]: Without dead ends: 113 [2019-01-11 14:11:43,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-11 14:11:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-01-11 14:11:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-01-11 14:11:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-01-11 14:11:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-01-11 14:11:43,950 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 108 [2019-01-11 14:11:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:43,951 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-01-11 14:11:43,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-01-11 14:11:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-01-11 14:11:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-01-11 14:11:43,951 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:43,952 INFO L402 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1] [2019-01-11 14:11:43,952 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash -429494752, now seen corresponding path program 36 times [2019-01-11 14:11:43,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:43,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:43,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:43,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:43,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:45,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:45,024 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:45,024 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:45,024 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:45,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:45,024 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:45,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:45,033 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:45,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:45,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:45,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:45,073 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:45,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:45,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:45,088 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:46,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:47,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:47,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2019-01-11 14:11:47,944 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:47,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-01-11 14:11:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-01-11 14:11:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-11 14:11:47,946 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 76 states. [2019-01-11 14:11:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:48,170 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-01-11 14:11:48,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-01-11 14:11:48,170 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 111 [2019-01-11 14:11:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:48,171 INFO L225 Difference]: With dead ends: 117 [2019-01-11 14:11:48,171 INFO L226 Difference]: Without dead ends: 116 [2019-01-11 14:11:48,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-11 14:11:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-01-11 14:11:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-01-11 14:11:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-01-11 14:11:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-01-11 14:11:48,176 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 111 [2019-01-11 14:11:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:48,176 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-01-11 14:11:48,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-01-11 14:11:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-01-11 14:11:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-01-11 14:11:48,177 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:48,177 INFO L402 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1] [2019-01-11 14:11:48,177 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -370540532, now seen corresponding path program 37 times [2019-01-11 14:11:48,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:48,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:48,178 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:49,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:49,017 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:49,017 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:49,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:49,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:49,018 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:49,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:49,025 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:11:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:49,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:49,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:49,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:49,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:49,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:50,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:52,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:52,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 114 [2019-01-11 14:11:52,417 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:52,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-01-11 14:11:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-01-11 14:11:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-11 14:11:52,419 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 78 states. [2019-01-11 14:11:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:52,747 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-01-11 14:11:52,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-01-11 14:11:52,748 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 114 [2019-01-11 14:11:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:52,749 INFO L225 Difference]: With dead ends: 120 [2019-01-11 14:11:52,749 INFO L226 Difference]: Without dead ends: 119 [2019-01-11 14:11:52,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-11 14:11:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-01-11 14:11:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-01-11 14:11:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-01-11 14:11:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-01-11 14:11:52,754 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 114 [2019-01-11 14:11:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:52,754 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-01-11 14:11:52,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-01-11 14:11:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-01-11 14:11:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-01-11 14:11:52,754 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:52,755 INFO L402 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1] [2019-01-11 14:11:52,755 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -706996576, now seen corresponding path program 38 times [2019-01-11 14:11:52,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:52,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:52,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:11:52,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:52,756 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:53,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:53,573 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:53,573 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:53,573 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:53,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:53,573 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:53,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:11:53,581 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:11:53,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-01-11 14:11:53,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:53,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:53,690 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:53,691 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:53,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:53,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:11:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:54,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:11:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:56,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:11:56,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-01-11 14:11:56,984 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:11:56,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-01-11 14:11:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-01-11 14:11:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-11 14:11:56,986 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 80 states. [2019-01-11 14:11:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:11:57,369 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-01-11 14:11:57,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-01-11 14:11:57,369 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 117 [2019-01-11 14:11:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:11:57,371 INFO L225 Difference]: With dead ends: 123 [2019-01-11 14:11:57,371 INFO L226 Difference]: Without dead ends: 122 [2019-01-11 14:11:57,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-11 14:11:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-01-11 14:11:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-01-11 14:11:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-11 14:11:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-01-11 14:11:57,376 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 117 [2019-01-11 14:11:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:11:57,376 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-01-11 14:11:57,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-01-11 14:11:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-01-11 14:11:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-01-11 14:11:57,377 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:11:57,377 INFO L402 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1] [2019-01-11 14:11:57,377 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:11:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:11:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 384665484, now seen corresponding path program 39 times [2019-01-11 14:11:57,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:11:57,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:57,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:11:57,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:11:57,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:11:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:11:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:11:58,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:58,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:11:58,393 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:11:58,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:11:58,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:11:58,393 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:11:58,402 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:11:58,403 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:11:58,443 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:11:58,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:11:58,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:11:58,467 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:11:58,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:11:58,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:11:58,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:00,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:02,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:02,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 120 [2019-01-11 14:12:02,640 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:02,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-01-11 14:12:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-01-11 14:12:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-11 14:12:02,642 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 82 states. [2019-01-11 14:12:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:02,935 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2019-01-11 14:12:02,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-01-11 14:12:02,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 120 [2019-01-11 14:12:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:02,937 INFO L225 Difference]: With dead ends: 126 [2019-01-11 14:12:02,937 INFO L226 Difference]: Without dead ends: 125 [2019-01-11 14:12:02,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-11 14:12:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-01-11 14:12:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-01-11 14:12:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-01-11 14:12:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-01-11 14:12:02,942 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 120 [2019-01-11 14:12:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:02,943 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-01-11 14:12:02,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-01-11 14:12:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-01-11 14:12:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-01-11 14:12:02,944 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:02,944 INFO L402 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1] [2019-01-11 14:12:02,944 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash 596729632, now seen corresponding path program 40 times [2019-01-11 14:12:02,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:02,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:02,945 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:03,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:03,904 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:03,904 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:03,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:03,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:03,904 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:03,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:03,912 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:12:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:03,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:03,954 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:03,955 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:03,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:03,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:04,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:07,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:07,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2019-01-11 14:12:07,078 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:07,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-01-11 14:12:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-01-11 14:12:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-11 14:12:07,081 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 84 states. [2019-01-11 14:12:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:07,530 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2019-01-11 14:12:07,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-01-11 14:12:07,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 123 [2019-01-11 14:12:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:07,532 INFO L225 Difference]: With dead ends: 129 [2019-01-11 14:12:07,532 INFO L226 Difference]: Without dead ends: 128 [2019-01-11 14:12:07,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-11 14:12:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-01-11 14:12:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-01-11 14:12:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-01-11 14:12:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2019-01-11 14:12:07,538 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 123 [2019-01-11 14:12:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:07,539 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2019-01-11 14:12:07,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-01-11 14:12:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2019-01-11 14:12:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-01-11 14:12:07,540 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:07,540 INFO L402 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1] [2019-01-11 14:12:07,540 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash 302870284, now seen corresponding path program 41 times [2019-01-11 14:12:07,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:07,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:07,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:07,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:07,542 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:08,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:08,495 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:08,495 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:08,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:08,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:08,495 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:08,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:12:08,503 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:12:08,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-01-11 14:12:08,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:08,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:08,655 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:08,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:08,665 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:08,665 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:09,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:11,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:11,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 126 [2019-01-11 14:12:11,885 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:11,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-01-11 14:12:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-01-11 14:12:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-11 14:12:11,887 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 86 states. [2019-01-11 14:12:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:12,229 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2019-01-11 14:12:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-01-11 14:12:12,229 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 126 [2019-01-11 14:12:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:12,230 INFO L225 Difference]: With dead ends: 132 [2019-01-11 14:12:12,231 INFO L226 Difference]: Without dead ends: 131 [2019-01-11 14:12:12,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-11 14:12:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-01-11 14:12:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-01-11 14:12:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-01-11 14:12:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2019-01-11 14:12:12,237 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 126 [2019-01-11 14:12:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:12,237 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2019-01-11 14:12:12,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-01-11 14:12:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2019-01-11 14:12:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-01-11 14:12:12,238 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:12,238 INFO L402 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1] [2019-01-11 14:12:12,238 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:12,239 INFO L82 PathProgramCache]: Analyzing trace with hash -917616736, now seen corresponding path program 42 times [2019-01-11 14:12:12,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:12,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:12,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:12,240 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:13,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:13,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:13,802 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:13,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:13,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:13,802 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:13,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:12:13,812 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:12:13,853 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:12:13,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:13,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:13,860 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:13,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:13,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:13,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:15,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:17,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:17,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 129 [2019-01-11 14:12:17,309 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:17,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-01-11 14:12:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-01-11 14:12:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-11 14:12:17,310 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 88 states. [2019-01-11 14:12:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:17,889 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-01-11 14:12:17,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-01-11 14:12:17,889 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 129 [2019-01-11 14:12:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:17,891 INFO L225 Difference]: With dead ends: 135 [2019-01-11 14:12:17,891 INFO L226 Difference]: Without dead ends: 134 [2019-01-11 14:12:17,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-11 14:12:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-11 14:12:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-01-11 14:12:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-01-11 14:12:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2019-01-11 14:12:17,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 129 [2019-01-11 14:12:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:17,896 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2019-01-11 14:12:17,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-01-11 14:12:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2019-01-11 14:12:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-01-11 14:12:17,897 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:17,897 INFO L402 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1] [2019-01-11 14:12:17,897 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash 746698380, now seen corresponding path program 43 times [2019-01-11 14:12:17,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:17,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:17,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:17,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:17,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:18,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:18,929 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:18,929 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:18,929 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:18,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:18,929 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:18,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:18,945 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:12:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:18,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:18,992 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:18,993 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:19,005 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:19,006 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:20,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:22,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:22,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 132 [2019-01-11 14:12:22,546 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:22,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-01-11 14:12:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-01-11 14:12:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-11 14:12:22,548 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 90 states. [2019-01-11 14:12:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:22,901 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2019-01-11 14:12:22,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-01-11 14:12:22,902 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 132 [2019-01-11 14:12:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:22,902 INFO L225 Difference]: With dead ends: 138 [2019-01-11 14:12:22,903 INFO L226 Difference]: Without dead ends: 137 [2019-01-11 14:12:22,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-11 14:12:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-01-11 14:12:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-01-11 14:12:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-01-11 14:12:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2019-01-11 14:12:22,909 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 132 [2019-01-11 14:12:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:22,909 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2019-01-11 14:12:22,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-01-11 14:12:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2019-01-11 14:12:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-01-11 14:12:22,910 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:22,911 INFO L402 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1] [2019-01-11 14:12:22,911 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1255854112, now seen corresponding path program 44 times [2019-01-11 14:12:22,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:22,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:22,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:22,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:22,912 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:24,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:24,342 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:24,342 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:24,342 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:24,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:24,342 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:24,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:12:24,351 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:12:24,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-01-11 14:12:24,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:24,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:24,483 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:24,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:24,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:24,494 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:25,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:28,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:28,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-01-11 14:12:28,371 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:28,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-01-11 14:12:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-01-11 14:12:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-11 14:12:28,373 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 92 states. [2019-01-11 14:12:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:28,638 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2019-01-11 14:12:28,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-01-11 14:12:28,641 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 135 [2019-01-11 14:12:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:28,642 INFO L225 Difference]: With dead ends: 141 [2019-01-11 14:12:28,642 INFO L226 Difference]: Without dead ends: 140 [2019-01-11 14:12:28,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-11 14:12:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-01-11 14:12:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-01-11 14:12:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-01-11 14:12:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2019-01-11 14:12:28,649 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 135 [2019-01-11 14:12:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:28,649 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2019-01-11 14:12:28,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-01-11 14:12:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2019-01-11 14:12:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-01-11 14:12:28,650 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:28,650 INFO L402 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1] [2019-01-11 14:12:28,651 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:28,651 INFO L82 PathProgramCache]: Analyzing trace with hash -310223348, now seen corresponding path program 45 times [2019-01-11 14:12:28,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:28,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:28,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:28,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:28,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:30,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:30,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:30,053 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:30,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:30,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:30,053 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:30,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:12:30,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:12:30,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:12:30,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:30,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:30,128 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:30,129 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:30,152 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:30,152 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:31,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:34,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:34,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 138 [2019-01-11 14:12:34,133 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:34,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-01-11 14:12:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-01-11 14:12:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-11 14:12:34,135 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 94 states. [2019-01-11 14:12:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:34,512 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2019-01-11 14:12:34,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-01-11 14:12:34,512 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 138 [2019-01-11 14:12:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:34,514 INFO L225 Difference]: With dead ends: 144 [2019-01-11 14:12:34,514 INFO L226 Difference]: Without dead ends: 143 [2019-01-11 14:12:34,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-11 14:12:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-11 14:12:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-01-11 14:12:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-01-11 14:12:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2019-01-11 14:12:34,519 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 138 [2019-01-11 14:12:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:34,520 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2019-01-11 14:12:34,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-01-11 14:12:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2019-01-11 14:12:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-01-11 14:12:34,521 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:34,521 INFO L402 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1] [2019-01-11 14:12:34,521 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash 905902240, now seen corresponding path program 46 times [2019-01-11 14:12:34,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:34,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:34,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:34,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:34,523 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:36,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:36,017 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:36,017 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:36,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:36,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:36,017 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:36,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:36,026 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:12:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:36,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:36,073 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:36,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:36,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:36,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:37,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:40,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:40,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2019-01-11 14:12:40,578 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:40,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-01-11 14:12:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-01-11 14:12:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-11 14:12:40,580 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 96 states. [2019-01-11 14:12:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:40,928 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-01-11 14:12:40,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-01-11 14:12:40,929 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 141 [2019-01-11 14:12:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:40,929 INFO L225 Difference]: With dead ends: 147 [2019-01-11 14:12:40,929 INFO L226 Difference]: Without dead ends: 146 [2019-01-11 14:12:40,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-11 14:12:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-11 14:12:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-01-11 14:12:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-11 14:12:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2019-01-11 14:12:40,933 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 141 [2019-01-11 14:12:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:40,934 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2019-01-11 14:12:40,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-01-11 14:12:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2019-01-11 14:12:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-01-11 14:12:40,934 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:40,934 INFO L402 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1] [2019-01-11 14:12:40,935 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1840814708, now seen corresponding path program 47 times [2019-01-11 14:12:40,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:40,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:40,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:40,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:40,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:42,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:42,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:42,088 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:42,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:42,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:42,088 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:42,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:12:42,097 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:12:42,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-01-11 14:12:42,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:42,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:42,262 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:42,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:42,341 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:42,341 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:44,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:46,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:46,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 144 [2019-01-11 14:12:46,851 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:46,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-01-11 14:12:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-01-11 14:12:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-11 14:12:46,853 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 98 states. [2019-01-11 14:12:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:47,181 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2019-01-11 14:12:47,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-01-11 14:12:47,182 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 144 [2019-01-11 14:12:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:47,183 INFO L225 Difference]: With dead ends: 150 [2019-01-11 14:12:47,183 INFO L226 Difference]: Without dead ends: 149 [2019-01-11 14:12:47,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-11 14:12:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-01-11 14:12:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-01-11 14:12:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-01-11 14:12:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-01-11 14:12:47,189 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 144 [2019-01-11 14:12:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:47,189 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-01-11 14:12:47,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-01-11 14:12:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-01-11 14:12:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-01-11 14:12:47,190 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:47,190 INFO L402 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1] [2019-01-11 14:12:47,190 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:47,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1568489184, now seen corresponding path program 48 times [2019-01-11 14:12:47,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:47,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:47,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:47,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:47,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:48,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:48,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:48,645 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:48,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:48,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:48,645 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:48,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:12:48,654 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:12:48,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:12:48,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:12:48,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:48,709 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:48,709 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:48,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:48,718 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:50,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:53,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:53,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2019-01-11 14:12:53,089 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:53,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-01-11 14:12:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-01-11 14:12:53,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-11 14:12:53,091 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 100 states. [2019-01-11 14:12:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:12:53,653 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2019-01-11 14:12:53,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-01-11 14:12:53,653 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 147 [2019-01-11 14:12:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:12:53,654 INFO L225 Difference]: With dead ends: 153 [2019-01-11 14:12:53,654 INFO L226 Difference]: Without dead ends: 152 [2019-01-11 14:12:53,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-11 14:12:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-11 14:12:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2019-01-11 14:12:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-01-11 14:12:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2019-01-11 14:12:53,660 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 147 [2019-01-11 14:12:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:12:53,660 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2019-01-11 14:12:53,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-01-11 14:12:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2019-01-11 14:12:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-01-11 14:12:53,661 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:12:53,661 INFO L402 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1] [2019-01-11 14:12:53,661 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:12:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:12:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1912025844, now seen corresponding path program 49 times [2019-01-11 14:12:53,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:12:53,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:53,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:12:53,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:12:53,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:12:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:54,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:54,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:12:54,910 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:12:54,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:12:54,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:12:54,910 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:12:54,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:12:54,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:12:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:12:54,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:12:54,996 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:12:54,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:12:55,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:12:55,090 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:12:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:56,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:12:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:12:59,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:12:59,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 150 [2019-01-11 14:12:59,955 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:12:59,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-01-11 14:12:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-01-11 14:12:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-11 14:12:59,958 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 102 states. [2019-01-11 14:13:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:00,297 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2019-01-11 14:13:00,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-01-11 14:13:00,298 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 150 [2019-01-11 14:13:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:00,299 INFO L225 Difference]: With dead ends: 156 [2019-01-11 14:13:00,299 INFO L226 Difference]: Without dead ends: 155 [2019-01-11 14:13:00,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-11 14:13:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-01-11 14:13:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-01-11 14:13:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-01-11 14:13:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2019-01-11 14:13:00,305 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 150 [2019-01-11 14:13:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:00,305 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2019-01-11 14:13:00,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-01-11 14:13:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2019-01-11 14:13:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-01-11 14:13:00,306 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:00,306 INFO L402 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1] [2019-01-11 14:13:00,307 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1305597536, now seen corresponding path program 50 times [2019-01-11 14:13:00,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:00,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:13:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:00,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:01,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:01,766 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:01,766 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:01,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:01,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:01,766 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:01,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:13:01,777 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:13:01,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-01-11 14:13:01,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:01,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:01,948 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:01,948 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:01,966 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:01,967 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:03,468 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:06,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:06,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2019-01-11 14:13:06,790 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:06,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-01-11 14:13:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-01-11 14:13:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-11 14:13:06,792 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 104 states. [2019-01-11 14:13:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:07,130 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-01-11 14:13:07,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-01-11 14:13:07,130 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 153 [2019-01-11 14:13:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:07,132 INFO L225 Difference]: With dead ends: 159 [2019-01-11 14:13:07,132 INFO L226 Difference]: Without dead ends: 158 [2019-01-11 14:13:07,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-11 14:13:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-01-11 14:13:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-01-11 14:13:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-01-11 14:13:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2019-01-11 14:13:07,138 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 153 [2019-01-11 14:13:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:07,138 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2019-01-11 14:13:07,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-01-11 14:13:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2019-01-11 14:13:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-01-11 14:13:07,139 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:07,139 INFO L402 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1] [2019-01-11 14:13:07,139 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash 167679116, now seen corresponding path program 51 times [2019-01-11 14:13:07,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:07,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:07,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:07,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:07,141 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:08,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:08,523 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:08,523 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:08,523 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:08,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:08,523 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:08,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:13:08,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:13:08,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:13:08,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:08,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:08,619 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:08,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:08,636 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:08,637 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:10,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:13,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:13,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 152 [2019-01-11 14:13:13,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:13,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-01-11 14:13:13,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-01-11 14:13:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-11 14:13:13,722 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 106 states. [2019-01-11 14:13:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:14,155 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2019-01-11 14:13:14,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-01-11 14:13:14,156 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 156 [2019-01-11 14:13:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:14,156 INFO L225 Difference]: With dead ends: 162 [2019-01-11 14:13:14,156 INFO L226 Difference]: Without dead ends: 161 [2019-01-11 14:13:14,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-11 14:13:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-01-11 14:13:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-01-11 14:13:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-01-11 14:13:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2019-01-11 14:13:14,161 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 156 [2019-01-11 14:13:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:14,161 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2019-01-11 14:13:14,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-01-11 14:13:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2019-01-11 14:13:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-01-11 14:13:14,162 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:14,162 INFO L402 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1] [2019-01-11 14:13:14,162 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 281621024, now seen corresponding path program 52 times [2019-01-11 14:13:14,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:14,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:14,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:14,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:14,163 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:15,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:15,668 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:15,668 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:15,668 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:15,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:15,668 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:15,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:13:15,678 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:13:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:15,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:15,733 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:15,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:15,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:15,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:17,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:20,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:20,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2019-01-11 14:13:20,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-01-11 14:13:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-01-11 14:13:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-11 14:13:20,873 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 108 states. [2019-01-11 14:13:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:21,277 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2019-01-11 14:13:21,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-01-11 14:13:21,278 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 159 [2019-01-11 14:13:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:21,279 INFO L225 Difference]: With dead ends: 165 [2019-01-11 14:13:21,279 INFO L226 Difference]: Without dead ends: 164 [2019-01-11 14:13:21,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 210 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-11 14:13:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-01-11 14:13:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-01-11 14:13:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-01-11 14:13:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2019-01-11 14:13:21,284 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 159 [2019-01-11 14:13:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:21,285 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2019-01-11 14:13:21,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-01-11 14:13:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2019-01-11 14:13:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-01-11 14:13:21,285 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:21,285 INFO L402 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1] [2019-01-11 14:13:21,286 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1700838412, now seen corresponding path program 53 times [2019-01-11 14:13:21,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:21,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:21,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:13:21,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:21,287 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:22,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:22,723 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:22,723 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:22,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:22,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:22,723 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:22,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:13:22,733 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:13:22,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-01-11 14:13:22,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:22,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:22,914 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:22,914 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:22,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:22,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:25,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:28,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:28,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 154 [2019-01-11 14:13:28,327 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:28,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-01-11 14:13:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-01-11 14:13:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-11 14:13:28,329 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 110 states. [2019-01-11 14:13:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:28,730 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2019-01-11 14:13:28,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-01-11 14:13:28,731 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 162 [2019-01-11 14:13:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:28,732 INFO L225 Difference]: With dead ends: 168 [2019-01-11 14:13:28,732 INFO L226 Difference]: Without dead ends: 167 [2019-01-11 14:13:28,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 214 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11888 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-11 14:13:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-01-11 14:13:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-01-11 14:13:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-01-11 14:13:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2019-01-11 14:13:28,737 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 162 [2019-01-11 14:13:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2019-01-11 14:13:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-01-11 14:13:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2019-01-11 14:13:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-01-11 14:13:28,738 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:28,738 INFO L402 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1] [2019-01-11 14:13:28,738 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1947982496, now seen corresponding path program 54 times [2019-01-11 14:13:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:28,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:28,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:30,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:30,596 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:30,597 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:30,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:30,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:30,597 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:30,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:13:30,607 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:13:30,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:13:30,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:30,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:30,684 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:30,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:30,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:30,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:32,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:36,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:36,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 155 [2019-01-11 14:13:36,064 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:36,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-01-11 14:13:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-01-11 14:13:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-11 14:13:36,065 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 112 states. [2019-01-11 14:13:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:36,446 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2019-01-11 14:13:36,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-01-11 14:13:36,446 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 165 [2019-01-11 14:13:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:36,447 INFO L225 Difference]: With dead ends: 171 [2019-01-11 14:13:36,447 INFO L226 Difference]: Without dead ends: 170 [2019-01-11 14:13:36,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12385 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-11 14:13:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-01-11 14:13:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-01-11 14:13:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-01-11 14:13:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2019-01-11 14:13:36,451 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 165 [2019-01-11 14:13:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:36,451 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2019-01-11 14:13:36,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-01-11 14:13:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2019-01-11 14:13:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-01-11 14:13:36,452 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:36,452 INFO L402 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1] [2019-01-11 14:13:36,452 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1251523700, now seen corresponding path program 55 times [2019-01-11 14:13:36,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:36,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:36,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:37,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:37,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:37,971 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:37,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:37,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:37,971 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:37,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:13:37,981 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:13:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:38,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:38,042 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:38,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:38,050 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:38,050 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:40,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:43,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:43,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 156 [2019-01-11 14:13:43,309 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:43,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-01-11 14:13:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-01-11 14:13:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-11 14:13:43,311 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 114 states. [2019-01-11 14:13:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:43,663 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2019-01-11 14:13:43,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-01-11 14:13:43,664 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 168 [2019-01-11 14:13:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:43,664 INFO L225 Difference]: With dead ends: 174 [2019-01-11 14:13:43,664 INFO L226 Difference]: Without dead ends: 173 [2019-01-11 14:13:43,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 222 SyntacticMatches, 12 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-11 14:13:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-01-11 14:13:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-01-11 14:13:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-01-11 14:13:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-01-11 14:13:43,669 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 168 [2019-01-11 14:13:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:43,669 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-01-11 14:13:43,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-01-11 14:13:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-01-11 14:13:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-01-11 14:13:43,670 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:43,670 INFO L402 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1] [2019-01-11 14:13:43,670 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 468591392, now seen corresponding path program 56 times [2019-01-11 14:13:43,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:43,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:43,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:13:43,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:43,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:45,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:45,447 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:45,447 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:45,448 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:45,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:45,448 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:45,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:13:45,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:13:45,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-01-11 14:13:45,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:45,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:45,669 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:45,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:45,679 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:45,679 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:47,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:51,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:51,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 157 [2019-01-11 14:13:51,123 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:51,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-01-11 14:13:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-01-11 14:13:51,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-11 14:13:51,125 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 116 states. [2019-01-11 14:13:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:51,522 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2019-01-11 14:13:51,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-01-11 14:13:51,522 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 171 [2019-01-11 14:13:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:51,523 INFO L225 Difference]: With dead ends: 177 [2019-01-11 14:13:51,523 INFO L226 Difference]: Without dead ends: 176 [2019-01-11 14:13:51,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 226 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13379 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-11 14:13:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-01-11 14:13:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2019-01-11 14:13:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-01-11 14:13:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2019-01-11 14:13:51,528 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 171 [2019-01-11 14:13:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:51,528 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2019-01-11 14:13:51,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-01-11 14:13:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2019-01-11 14:13:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-01-11 14:13:51,529 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:51,529 INFO L402 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1] [2019-01-11 14:13:51,529 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1162488588, now seen corresponding path program 57 times [2019-01-11 14:13:51,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:51,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:51,530 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:13:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:53,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:53,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:13:53,088 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:13:53,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:13:53,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:13:53,088 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:13:53,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:13:53,097 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:13:53,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:13:53,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:13:53,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:13:53,163 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:13:53,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:13:53,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:13:53,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:13:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:55,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:13:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:13:58,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:13:58,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 158 [2019-01-11 14:13:58,783 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:13:58,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-01-11 14:13:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-01-11 14:13:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-11 14:13:58,785 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 118 states. [2019-01-11 14:13:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:13:59,202 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2019-01-11 14:13:59,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-01-11 14:13:59,203 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 174 [2019-01-11 14:13:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:13:59,204 INFO L225 Difference]: With dead ends: 180 [2019-01-11 14:13:59,204 INFO L226 Difference]: Without dead ends: 179 [2019-01-11 14:13:59,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 230 SyntacticMatches, 16 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-11 14:13:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-01-11 14:13:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-01-11 14:13:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-11 14:13:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2019-01-11 14:13:59,210 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 174 [2019-01-11 14:13:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:13:59,210 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2019-01-11 14:13:59,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-01-11 14:13:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2019-01-11 14:13:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-01-11 14:13:59,211 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:13:59,211 INFO L402 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1] [2019-01-11 14:13:59,211 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:13:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:13:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1376258976, now seen corresponding path program 58 times [2019-01-11 14:13:59,212 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:13:59,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:59,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:13:59,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:13:59,213 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:13:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:01,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:01,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:01,128 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:01,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:01,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:01,128 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:01,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:01,138 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:14:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:01,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:01,195 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:01,195 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:01,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:01,204 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:03,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:06,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:06,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 159 [2019-01-11 14:14:06,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:06,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-01-11 14:14:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-01-11 14:14:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-11 14:14:06,873 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 120 states. [2019-01-11 14:14:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:07,329 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2019-01-11 14:14:07,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-01-11 14:14:07,330 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 177 [2019-01-11 14:14:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:07,331 INFO L225 Difference]: With dead ends: 183 [2019-01-11 14:14:07,332 INFO L226 Difference]: Without dead ends: 182 [2019-01-11 14:14:07,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 234 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14373 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-11 14:14:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-01-11 14:14:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-01-11 14:14:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-11 14:14:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2019-01-11 14:14:07,337 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 177 [2019-01-11 14:14:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:07,337 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2019-01-11 14:14:07,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-01-11 14:14:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2019-01-11 14:14:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-01-11 14:14:07,338 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:07,338 INFO L402 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1] [2019-01-11 14:14:07,339 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 373387916, now seen corresponding path program 59 times [2019-01-11 14:14:07,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:07,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:07,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:07,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:07,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:09,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:09,064 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:09,064 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:09,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:09,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:09,064 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:09,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:14:09,073 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:14:09,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-01-11 14:14:09,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:14:09,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:09,462 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:09,462 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:09,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:09,470 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:11,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:15,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:15,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 160 [2019-01-11 14:14:15,614 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:15,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-01-11 14:14:15,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-01-11 14:14:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-11 14:14:15,616 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 122 states. [2019-01-11 14:14:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:16,001 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2019-01-11 14:14:16,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-01-11 14:14:16,002 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 180 [2019-01-11 14:14:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:16,003 INFO L225 Difference]: With dead ends: 186 [2019-01-11 14:14:16,004 INFO L226 Difference]: Without dead ends: 185 [2019-01-11 14:14:16,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 238 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14870 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-11 14:14:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-01-11 14:14:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-01-11 14:14:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-01-11 14:14:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2019-01-11 14:14:16,010 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 180 [2019-01-11 14:14:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:16,010 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2019-01-11 14:14:16,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-01-11 14:14:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2019-01-11 14:14:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-01-11 14:14:16,011 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:16,011 INFO L402 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1] [2019-01-11 14:14:16,011 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash -365849568, now seen corresponding path program 60 times [2019-01-11 14:14:16,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:16,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:16,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:14:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:16,013 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:17,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:17,776 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:17,776 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:17,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:17,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:17,777 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:17,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:14:17,788 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:14:17,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:14:17,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:14:17,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:17,882 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:17,883 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:17,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:17,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:20,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:23,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:23,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 161 [2019-01-11 14:14:23,659 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-01-11 14:14:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-01-11 14:14:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-11 14:14:23,661 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 124 states. [2019-01-11 14:14:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:24,097 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2019-01-11 14:14:24,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-01-11 14:14:24,097 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 183 [2019-01-11 14:14:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:24,098 INFO L225 Difference]: With dead ends: 189 [2019-01-11 14:14:24,098 INFO L226 Difference]: Without dead ends: 188 [2019-01-11 14:14:24,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15367 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-11 14:14:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-01-11 14:14:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2019-01-11 14:14:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-01-11 14:14:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2019-01-11 14:14:24,103 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 183 [2019-01-11 14:14:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:24,103 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2019-01-11 14:14:24,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-01-11 14:14:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2019-01-11 14:14:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-01-11 14:14:24,104 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:24,104 INFO L402 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1] [2019-01-11 14:14:24,104 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1602558476, now seen corresponding path program 61 times [2019-01-11 14:14:24,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:24,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:14:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:24,105 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:26,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:26,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:26,108 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:26,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:26,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:26,108 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:26,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:26,116 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:14:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:26,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:26,177 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:26,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:26,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:26,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:28,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:32,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:32,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 162 [2019-01-11 14:14:32,247 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:32,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-01-11 14:14:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-01-11 14:14:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-11 14:14:32,249 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 126 states. [2019-01-11 14:14:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:32,752 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2019-01-11 14:14:32,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-01-11 14:14:32,752 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 186 [2019-01-11 14:14:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:32,753 INFO L225 Difference]: With dead ends: 192 [2019-01-11 14:14:32,753 INFO L226 Difference]: Without dead ends: 191 [2019-01-11 14:14:32,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 246 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15864 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-11 14:14:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-01-11 14:14:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-01-11 14:14:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-01-11 14:14:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2019-01-11 14:14:32,757 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 186 [2019-01-11 14:14:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:32,758 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2019-01-11 14:14:32,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-01-11 14:14:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2019-01-11 14:14:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-01-11 14:14:32,758 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:32,759 INFO L402 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1] [2019-01-11 14:14:32,759 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1036862304, now seen corresponding path program 62 times [2019-01-11 14:14:32,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:32,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:32,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:32,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:32,760 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:34,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:34,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:34,753 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:34,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:34,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:34,753 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:34,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:14:34,762 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:14:35,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2019-01-11 14:14:35,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:14:35,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:35,024 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:35,024 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:35,050 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:35,051 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:37,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:41,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:41,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 163 [2019-01-11 14:14:41,528 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:41,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-01-11 14:14:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-01-11 14:14:41,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-11 14:14:41,531 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 128 states. [2019-01-11 14:14:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:42,025 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2019-01-11 14:14:42,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-01-11 14:14:42,025 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 189 [2019-01-11 14:14:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:42,026 INFO L225 Difference]: With dead ends: 195 [2019-01-11 14:14:42,026 INFO L226 Difference]: Without dead ends: 194 [2019-01-11 14:14:42,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 250 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-11 14:14:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-01-11 14:14:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-01-11 14:14:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-01-11 14:14:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2019-01-11 14:14:42,031 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 189 [2019-01-11 14:14:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:42,031 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2019-01-11 14:14:42,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-01-11 14:14:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2019-01-11 14:14:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-01-11 14:14:42,032 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:42,032 INFO L402 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1] [2019-01-11 14:14:42,032 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 239935884, now seen corresponding path program 63 times [2019-01-11 14:14:42,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:42,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:42,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:14:42,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:42,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:43,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:43,933 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:43,933 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:43,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:43,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:43,933 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:43,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:14:43,942 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:14:44,004 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:14:44,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:14:44,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:44,013 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:44,013 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:44,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:44,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:46,484 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:50,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:50,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 164 [2019-01-11 14:14:50,184 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-01-11 14:14:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-01-11 14:14:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-11 14:14:50,186 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 130 states. [2019-01-11 14:14:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:50,693 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2019-01-11 14:14:50,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-01-11 14:14:50,694 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 192 [2019-01-11 14:14:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:50,695 INFO L225 Difference]: With dead ends: 198 [2019-01-11 14:14:50,695 INFO L226 Difference]: Without dead ends: 197 [2019-01-11 14:14:50,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 254 SyntacticMatches, 28 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16858 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-11 14:14:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-01-11 14:14:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-01-11 14:14:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-01-11 14:14:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-01-11 14:14:50,702 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 192 [2019-01-11 14:14:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:50,702 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-01-11 14:14:50,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-01-11 14:14:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-01-11 14:14:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-01-11 14:14:50,703 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:50,704 INFO L402 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1] [2019-01-11 14:14:50,704 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1104381216, now seen corresponding path program 64 times [2019-01-11 14:14:50,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:50,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:50,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:14:50,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:50,705 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:52,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:52,820 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:14:52,820 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:14:52,820 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:14:52,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:14:52,820 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:14:52,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:52,830 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:14:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:14:52,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:14:52,897 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:14:52,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:14:52,910 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:14:52,910 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:14:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:55,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:14:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:14:59,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:14:59,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 165 [2019-01-11 14:14:59,147 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:14:59,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-01-11 14:14:59,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-01-11 14:14:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-11 14:14:59,149 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 132 states. [2019-01-11 14:14:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:14:59,610 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2019-01-11 14:14:59,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-01-11 14:14:59,611 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 195 [2019-01-11 14:14:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:14:59,612 INFO L225 Difference]: With dead ends: 201 [2019-01-11 14:14:59,612 INFO L226 Difference]: Without dead ends: 200 [2019-01-11 14:14:59,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 258 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17355 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-11 14:14:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-01-11 14:14:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-01-11 14:14:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-01-11 14:14:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2019-01-11 14:14:59,619 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 195 [2019-01-11 14:14:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:14:59,619 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2019-01-11 14:14:59,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-01-11 14:14:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2019-01-11 14:14:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-01-11 14:14:59,621 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:14:59,621 INFO L402 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1] [2019-01-11 14:14:59,621 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:14:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:14:59,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1171360012, now seen corresponding path program 65 times [2019-01-11 14:14:59,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:14:59,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:59,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:14:59,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:14:59,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:14:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:01,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:01,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:01,942 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:01,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:01,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:01,942 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:01,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:15:01,950 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:15:02,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2019-01-11 14:15:02,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:15:02,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:02,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:02,219 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:02,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:02,231 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:04,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:08,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:08,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 166 [2019-01-11 14:15:08,572 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:08,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-01-11 14:15:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-01-11 14:15:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-11 14:15:08,574 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 134 states. [2019-01-11 14:15:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:09,031 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2019-01-11 14:15:09,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-01-11 14:15:09,031 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 198 [2019-01-11 14:15:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:09,033 INFO L225 Difference]: With dead ends: 204 [2019-01-11 14:15:09,033 INFO L226 Difference]: Without dead ends: 203 [2019-01-11 14:15:09,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 262 SyntacticMatches, 32 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17852 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-11 14:15:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-01-11 14:15:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-01-11 14:15:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-01-11 14:15:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2019-01-11 14:15:09,054 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 198 [2019-01-11 14:15:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:09,054 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2019-01-11 14:15:09,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-01-11 14:15:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2019-01-11 14:15:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-01-11 14:15:09,055 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:09,055 INFO L402 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1] [2019-01-11 14:15:09,055 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -623120992, now seen corresponding path program 66 times [2019-01-11 14:15:09,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:09,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:09,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:15:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:09,057 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:11,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:11,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:11,107 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:11,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:11,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:11,107 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:11,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:15:11,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:15:11,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:15:11,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:15:11,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:11,192 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:11,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:11,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:11,200 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:13,838 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:17,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:17,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 167 [2019-01-11 14:15:17,768 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:17,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-01-11 14:15:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-01-11 14:15:17,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-11 14:15:17,770 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 136 states. [2019-01-11 14:15:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:18,259 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2019-01-11 14:15:18,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-01-11 14:15:18,260 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 201 [2019-01-11 14:15:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:18,261 INFO L225 Difference]: With dead ends: 207 [2019-01-11 14:15:18,261 INFO L226 Difference]: Without dead ends: 206 [2019-01-11 14:15:18,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 266 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18349 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-11 14:15:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-01-11 14:15:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-01-11 14:15:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-01-11 14:15:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2019-01-11 14:15:18,266 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 201 [2019-01-11 14:15:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:18,266 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2019-01-11 14:15:18,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-01-11 14:15:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2019-01-11 14:15:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-01-11 14:15:18,267 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:18,267 INFO L402 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1] [2019-01-11 14:15:18,267 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash -548777844, now seen corresponding path program 67 times [2019-01-11 14:15:18,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:18,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:18,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:15:18,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:18,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:20,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:20,347 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:20,348 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:20,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:20,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:20,348 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:20,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:15:20,358 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:15:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:20,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:20,425 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:20,425 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:20,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:20,434 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:23,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:27,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:27,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2019-01-11 14:15:27,052 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:27,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-01-11 14:15:27,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-01-11 14:15:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-11 14:15:27,054 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 138 states. [2019-01-11 14:15:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:27,525 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2019-01-11 14:15:27,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-01-11 14:15:27,525 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 204 [2019-01-11 14:15:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:27,526 INFO L225 Difference]: With dead ends: 210 [2019-01-11 14:15:27,526 INFO L226 Difference]: Without dead ends: 209 [2019-01-11 14:15:27,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 270 SyntacticMatches, 36 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-11 14:15:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-01-11 14:15:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-01-11 14:15:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-01-11 14:15:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2019-01-11 14:15:27,532 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 204 [2019-01-11 14:15:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:27,533 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2019-01-11 14:15:27,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-01-11 14:15:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2019-01-11 14:15:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-01-11 14:15:27,534 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:27,534 INFO L402 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1] [2019-01-11 14:15:27,534 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1995180512, now seen corresponding path program 68 times [2019-01-11 14:15:27,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:27,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:27,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:15:27,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:27,536 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:29,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:29,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:29,677 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:29,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:29,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:29,678 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:29,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:15:29,685 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:15:29,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2019-01-11 14:15:29,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:15:29,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:29,984 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:29,984 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:29,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:29,995 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:32,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:36,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:36,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 169 [2019-01-11 14:15:36,514 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:36,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-01-11 14:15:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-01-11 14:15:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-11 14:15:36,516 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 140 states. [2019-01-11 14:15:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:37,049 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2019-01-11 14:15:37,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-01-11 14:15:37,050 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 207 [2019-01-11 14:15:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:37,051 INFO L225 Difference]: With dead ends: 213 [2019-01-11 14:15:37,051 INFO L226 Difference]: Without dead ends: 212 [2019-01-11 14:15:37,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 274 SyntacticMatches, 38 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-11 14:15:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-01-11 14:15:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-01-11 14:15:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-01-11 14:15:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2019-01-11 14:15:37,058 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 207 [2019-01-11 14:15:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:37,059 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2019-01-11 14:15:37,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-01-11 14:15:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2019-01-11 14:15:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-01-11 14:15:37,060 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:37,060 INFO L402 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1] [2019-01-11 14:15:37,060 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash -370182132, now seen corresponding path program 69 times [2019-01-11 14:15:37,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:37,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:37,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:15:37,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:37,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:39,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:39,549 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:39,549 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:39,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:39,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:39,549 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:39,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:15:39,564 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:15:39,628 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:15:39,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:15:39,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:39,638 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:39,638 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:39,648 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:39,648 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:42,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:46,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:46,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2019-01-11 14:15:46,308 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:46,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-01-11 14:15:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-01-11 14:15:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-11 14:15:46,310 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 142 states. [2019-01-11 14:15:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:46,787 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2019-01-11 14:15:46,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-01-11 14:15:46,787 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 210 [2019-01-11 14:15:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:46,789 INFO L225 Difference]: With dead ends: 216 [2019-01-11 14:15:46,789 INFO L226 Difference]: Without dead ends: 215 [2019-01-11 14:15:46,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 278 SyntacticMatches, 40 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19840 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-11 14:15:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-01-11 14:15:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-01-11 14:15:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-01-11 14:15:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2019-01-11 14:15:46,796 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 210 [2019-01-11 14:15:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2019-01-11 14:15:46,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-01-11 14:15:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2019-01-11 14:15:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-01-11 14:15:46,798 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:46,798 INFO L402 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1] [2019-01-11 14:15:46,798 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1380163232, now seen corresponding path program 70 times [2019-01-11 14:15:46,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:46,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:15:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:46,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:49,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:49,168 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:49,168 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:49,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:49,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:49,169 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:49,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:15:49,177 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:15:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:49,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:49,243 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:49,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:49,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:49,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:15:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:52,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:15:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:56,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:15:56,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 171 [2019-01-11 14:15:56,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:15:56,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-01-11 14:15:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-01-11 14:15:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-11 14:15:56,355 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 144 states. [2019-01-11 14:15:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:15:56,837 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-01-11 14:15:56,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-01-11 14:15:56,838 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 213 [2019-01-11 14:15:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:15:56,839 INFO L225 Difference]: With dead ends: 219 [2019-01-11 14:15:56,839 INFO L226 Difference]: Without dead ends: 218 [2019-01-11 14:15:56,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 282 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20337 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-11 14:15:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-01-11 14:15:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-01-11 14:15:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-01-11 14:15:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2019-01-11 14:15:56,845 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 213 [2019-01-11 14:15:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:15:56,845 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2019-01-11 14:15:56,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-01-11 14:15:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2019-01-11 14:15:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-01-11 14:15:56,846 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:15:56,846 INFO L402 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1] [2019-01-11 14:15:56,846 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:15:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:15:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash 720961420, now seen corresponding path program 71 times [2019-01-11 14:15:56,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:15:56,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:56,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:15:56,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:15:56,848 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:15:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:15:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:15:59,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:59,487 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:15:59,487 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:15:59,488 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:15:59,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:15:59,488 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:15:59,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:15:59,495 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:15:59,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2019-01-11 14:15:59,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:15:59,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:15:59,817 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:15:59,818 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:15:59,825 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:15:59,825 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:02,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:16:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:06,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:16:06,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 172 [2019-01-11 14:16:06,774 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:16:06,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-01-11 14:16:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-01-11 14:16:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-11 14:16:06,777 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 146 states. [2019-01-11 14:16:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:16:07,264 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2019-01-11 14:16:07,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-01-11 14:16:07,264 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 216 [2019-01-11 14:16:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:16:07,266 INFO L225 Difference]: With dead ends: 222 [2019-01-11 14:16:07,266 INFO L226 Difference]: Without dead ends: 221 [2019-01-11 14:16:07,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 286 SyntacticMatches, 44 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20834 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-11 14:16:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-01-11 14:16:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2019-01-11 14:16:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-01-11 14:16:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-01-11 14:16:07,271 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 216 [2019-01-11 14:16:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:16:07,272 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-01-11 14:16:07,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-01-11 14:16:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-01-11 14:16:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-01-11 14:16:07,273 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:16:07,273 INFO L402 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1] [2019-01-11 14:16:07,273 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:16:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:16:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -969742560, now seen corresponding path program 72 times [2019-01-11 14:16:07,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:16:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:07,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:16:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:07,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:16:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:09,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:09,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:16:09,968 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:16:09,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:16:09,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:09,969 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:16:09,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:16:09,976 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:16:10,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:16:10,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:16:10,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:16:10,053 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:16:10,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:16:10,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:16:10,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:13,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:16:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:17,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:16:17,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 173 [2019-01-11 14:16:17,152 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:16:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-01-11 14:16:17,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-01-11 14:16:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-11 14:16:17,155 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 148 states. [2019-01-11 14:16:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:16:17,662 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2019-01-11 14:16:17,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-01-11 14:16:17,662 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 219 [2019-01-11 14:16:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:16:17,664 INFO L225 Difference]: With dead ends: 225 [2019-01-11 14:16:17,664 INFO L226 Difference]: Without dead ends: 224 [2019-01-11 14:16:17,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 290 SyntacticMatches, 46 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21331 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-11 14:16:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-01-11 14:16:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-01-11 14:16:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-01-11 14:16:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2019-01-11 14:16:17,670 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 219 [2019-01-11 14:16:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:16:17,670 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2019-01-11 14:16:17,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-01-11 14:16:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2019-01-11 14:16:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-01-11 14:16:17,671 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:16:17,672 INFO L402 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1] [2019-01-11 14:16:17,672 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:16:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:16:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1650530548, now seen corresponding path program 73 times [2019-01-11 14:16:17,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:16:17,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:17,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:16:17,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:17,673 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:16:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:20,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:20,499 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:16:20,499 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:16:20,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:16:20,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:20,499 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:16:20,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:16:20,507 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:16:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:20,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:16:20,584 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:16:20,584 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:16:20,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:16:20,593 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:23,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:16:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:27,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:16:27,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 174 [2019-01-11 14:16:27,910 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:16:27,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-01-11 14:16:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-01-11 14:16:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-11 14:16:27,913 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 150 states. [2019-01-11 14:16:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:16:28,482 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2019-01-11 14:16:28,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-01-11 14:16:28,482 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 222 [2019-01-11 14:16:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:16:28,484 INFO L225 Difference]: With dead ends: 228 [2019-01-11 14:16:28,484 INFO L226 Difference]: Without dead ends: 227 [2019-01-11 14:16:28,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 294 SyntacticMatches, 48 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-11 14:16:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-01-11 14:16:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-01-11 14:16:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-01-11 14:16:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2019-01-11 14:16:28,491 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 222 [2019-01-11 14:16:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:16:28,491 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2019-01-11 14:16:28,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-01-11 14:16:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2019-01-11 14:16:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-01-11 14:16:28,492 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:16:28,492 INFO L402 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1] [2019-01-11 14:16:28,493 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:16:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:16:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2125057952, now seen corresponding path program 74 times [2019-01-11 14:16:28,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:16:28,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:28,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:16:28,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:28,494 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:16:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:31,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:31,142 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:16:31,142 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:16:31,142 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:16:31,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:31,142 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:16:31,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:16:31,151 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:16:31,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2019-01-11 14:16:31,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:16:31,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:16:31,463 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:16:31,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:16:31,475 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:16:31,475 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:34,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:16:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:38,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:16:38,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 175 [2019-01-11 14:16:38,591 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:16:38,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-01-11 14:16:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-01-11 14:16:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-11 14:16:38,594 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 152 states. [2019-01-11 14:16:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:16:39,225 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2019-01-11 14:16:39,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-01-11 14:16:39,225 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 225 [2019-01-11 14:16:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:16:39,227 INFO L225 Difference]: With dead ends: 231 [2019-01-11 14:16:39,227 INFO L226 Difference]: Without dead ends: 230 [2019-01-11 14:16:39,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 298 SyntacticMatches, 50 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-11 14:16:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-11 14:16:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-01-11 14:16:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-01-11 14:16:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2019-01-11 14:16:39,233 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 225 [2019-01-11 14:16:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:16:39,233 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2019-01-11 14:16:39,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-01-11 14:16:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2019-01-11 14:16:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-01-11 14:16:39,234 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:16:39,234 INFO L402 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1] [2019-01-11 14:16:39,235 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:16:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:16:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash -216453492, now seen corresponding path program 75 times [2019-01-11 14:16:39,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:16:39,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:39,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:16:39,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:39,236 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:16:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:41,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:41,823 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:16:41,823 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:16:41,823 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:16:41,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:41,824 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:16:41,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:16:41,833 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:16:41,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:16:41,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:16:41,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:16:41,917 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:16:41,917 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:16:41,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:16:41,930 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:45,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:16:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:49,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:16:49,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 176 [2019-01-11 14:16:49,543 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:16:49,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-01-11 14:16:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-01-11 14:16:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-11 14:16:49,546 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 154 states. [2019-01-11 14:16:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:16:50,162 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2019-01-11 14:16:50,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-01-11 14:16:50,162 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 228 [2019-01-11 14:16:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:16:50,164 INFO L225 Difference]: With dead ends: 234 [2019-01-11 14:16:50,164 INFO L226 Difference]: Without dead ends: 233 [2019-01-11 14:16:50,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 302 SyntacticMatches, 52 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22822 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-11 14:16:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-01-11 14:16:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2019-01-11 14:16:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-01-11 14:16:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2019-01-11 14:16:50,170 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 228 [2019-01-11 14:16:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:16:50,171 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2019-01-11 14:16:50,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-01-11 14:16:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2019-01-11 14:16:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-01-11 14:16:50,172 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:16:50,172 INFO L402 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1] [2019-01-11 14:16:50,173 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:16:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:16:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1620027360, now seen corresponding path program 76 times [2019-01-11 14:16:50,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:16:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:50,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:16:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:16:50,174 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:16:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:52,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:52,913 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:16:52,913 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:16:52,913 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:16:52,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:16:52,913 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:16:52,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:16:52,923 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:16:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:16:52,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:16:52,995 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:16:52,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:16:53,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:16:53,009 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:16:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:16:56,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:00,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:00,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 177 [2019-01-11 14:17:00,942 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:00,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-01-11 14:17:00,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-01-11 14:17:00,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-11 14:17:00,944 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 156 states. [2019-01-11 14:17:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:17:01,501 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2019-01-11 14:17:01,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-01-11 14:17:01,502 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 231 [2019-01-11 14:17:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:17:01,503 INFO L225 Difference]: With dead ends: 237 [2019-01-11 14:17:01,503 INFO L226 Difference]: Without dead ends: 236 [2019-01-11 14:17:01,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 306 SyntacticMatches, 54 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23319 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-11 14:17:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-01-11 14:17:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2019-01-11 14:17:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-01-11 14:17:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2019-01-11 14:17:01,509 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 231 [2019-01-11 14:17:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:17:01,509 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2019-01-11 14:17:01,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-01-11 14:17:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2019-01-11 14:17:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-01-11 14:17:01,510 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:17:01,511 INFO L402 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1] [2019-01-11 14:17:01,511 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:17:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:17:01,511 INFO L82 PathProgramCache]: Analyzing trace with hash 312464908, now seen corresponding path program 77 times [2019-01-11 14:17:01,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:17:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:01,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:17:01,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:01,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:17:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:04,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:04,345 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:17:04,345 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:17:04,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:17:04,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:04,345 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:17:04,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:17:04,353 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:17:04,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2019-01-11 14:17:04,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:17:04,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:17:04,736 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:17:04,736 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:17:04,745 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:17:04,745 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:17:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:08,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:12,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:12,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 178 [2019-01-11 14:17:12,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:12,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-01-11 14:17:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-01-11 14:17:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-11 14:17:12,091 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 158 states. [2019-01-11 14:17:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:17:12,722 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2019-01-11 14:17:12,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-01-11 14:17:12,723 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 234 [2019-01-11 14:17:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:17:12,724 INFO L225 Difference]: With dead ends: 240 [2019-01-11 14:17:12,724 INFO L226 Difference]: Without dead ends: 239 [2019-01-11 14:17:12,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 310 SyntacticMatches, 56 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23816 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-11 14:17:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-01-11 14:17:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-01-11 14:17:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-01-11 14:17:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2019-01-11 14:17:12,729 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 234 [2019-01-11 14:17:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:17:12,729 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2019-01-11 14:17:12,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2019-01-11 14:17:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2019-01-11 14:17:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-01-11 14:17:12,730 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:17:12,730 INFO L402 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1] [2019-01-11 14:17:12,731 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:17:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:17:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1447985312, now seen corresponding path program 78 times [2019-01-11 14:17:12,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:17:12,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:12,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:17:12,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:12,732 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:17:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:15,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:15,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:17:15,963 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:17:15,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:17:15,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:15,963 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:17:15,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:17:15,972 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:17:16,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:17:16,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:17:16,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:17:16,059 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:17:16,059 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:17:16,067 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:17:16,067 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:17:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:19,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:23,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:23,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 179 [2019-01-11 14:17:23,693 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:23,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-01-11 14:17:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-01-11 14:17:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-11 14:17:23,696 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 160 states. [2019-01-11 14:17:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:17:24,277 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2019-01-11 14:17:24,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-01-11 14:17:24,278 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 237 [2019-01-11 14:17:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:17:24,279 INFO L225 Difference]: With dead ends: 243 [2019-01-11 14:17:24,279 INFO L226 Difference]: Without dead ends: 242 [2019-01-11 14:17:24,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 314 SyntacticMatches, 58 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24313 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-11 14:17:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-01-11 14:17:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2019-01-11 14:17:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-01-11 14:17:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2019-01-11 14:17:24,286 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 237 [2019-01-11 14:17:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:17:24,286 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2019-01-11 14:17:24,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2019-01-11 14:17:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2019-01-11 14:17:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-01-11 14:17:24,287 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:17:24,287 INFO L402 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1] [2019-01-11 14:17:24,288 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:17:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:17:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1721049716, now seen corresponding path program 79 times [2019-01-11 14:17:24,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:17:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:24,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:17:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:24,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:17:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:27,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:27,652 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:17:27,652 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:17:27,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:17:27,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:27,652 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:17:27,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:17:27,661 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:17:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:27,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:17:27,737 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:17:27,737 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:17:27,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:17:27,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:17:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:31,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:35,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:35,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 180 [2019-01-11 14:17:35,783 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:35,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2019-01-11 14:17:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2019-01-11 14:17:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-11 14:17:35,785 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 162 states. [2019-01-11 14:17:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:17:36,355 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2019-01-11 14:17:36,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-01-11 14:17:36,355 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 240 [2019-01-11 14:17:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:17:36,356 INFO L225 Difference]: With dead ends: 246 [2019-01-11 14:17:36,356 INFO L226 Difference]: Without dead ends: 245 [2019-01-11 14:17:36,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 318 SyntacticMatches, 60 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24810 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-11 14:17:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-01-11 14:17:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2019-01-11 14:17:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-01-11 14:17:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-01-11 14:17:36,361 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 240 [2019-01-11 14:17:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:17:36,361 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-01-11 14:17:36,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2019-01-11 14:17:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-01-11 14:17:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-01-11 14:17:36,362 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:17:36,362 INFO L402 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1] [2019-01-11 14:17:36,362 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:17:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:17:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1527531808, now seen corresponding path program 80 times [2019-01-11 14:17:36,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:17:36,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:36,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:17:36,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:36,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:17:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:39,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:39,400 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:17:39,400 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:17:39,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:17:39,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:39,400 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:17:39,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:17:39,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:17:39,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-01-11 14:17:39,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:17:39,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:17:39,817 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:17:39,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:17:39,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:17:39,831 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:17:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:43,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:47,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:47,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 181 [2019-01-11 14:17:47,959 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:47,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2019-01-11 14:17:47,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2019-01-11 14:17:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-11 14:17:47,961 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 164 states. [2019-01-11 14:17:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:17:48,504 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2019-01-11 14:17:48,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-01-11 14:17:48,504 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 243 [2019-01-11 14:17:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:17:48,505 INFO L225 Difference]: With dead ends: 249 [2019-01-11 14:17:48,506 INFO L226 Difference]: Without dead ends: 248 [2019-01-11 14:17:48,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 322 SyntacticMatches, 62 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25307 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-11 14:17:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-01-11 14:17:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2019-01-11 14:17:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-01-11 14:17:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2019-01-11 14:17:48,511 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 243 [2019-01-11 14:17:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:17:48,511 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2019-01-11 14:17:48,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2019-01-11 14:17:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2019-01-11 14:17:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-01-11 14:17:48,512 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:17:48,512 INFO L402 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1] [2019-01-11 14:17:48,512 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:17:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:17:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1521632524, now seen corresponding path program 81 times [2019-01-11 14:17:48,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:17:48,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:48,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:17:48,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:17:48,513 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:17:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:17:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:51,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:51,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:17:51,696 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:17:51,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:17:51,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:17:51,696 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:17:51,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:17:51,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:17:51,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:17:51,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:17:51,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:17:51,796 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:17:51,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:17:51,804 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:17:51,804 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:17:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:55,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:17:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:17:59,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:17:59,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 182 [2019-01-11 14:17:59,842 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:17:59,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2019-01-11 14:17:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2019-01-11 14:17:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-11 14:17:59,845 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 166 states. [2019-01-11 14:18:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:18:00,434 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2019-01-11 14:18:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-01-11 14:18:00,435 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 246 [2019-01-11 14:18:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:18:00,436 INFO L225 Difference]: With dead ends: 252 [2019-01-11 14:18:00,436 INFO L226 Difference]: Without dead ends: 251 [2019-01-11 14:18:00,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 326 SyntacticMatches, 64 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25804 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-11 14:18:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-01-11 14:18:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2019-01-11 14:18:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-01-11 14:18:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2019-01-11 14:18:00,440 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 246 [2019-01-11 14:18:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:18:00,441 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2019-01-11 14:18:00,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2019-01-11 14:18:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2019-01-11 14:18:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-01-11 14:18:00,442 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:18:00,442 INFO L402 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1] [2019-01-11 14:18:00,442 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:18:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:18:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1869722016, now seen corresponding path program 82 times [2019-01-11 14:18:00,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:18:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:00,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:18:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:00,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:18:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:03,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:03,647 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:18:03,647 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:18:03,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:18:03,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:03,647 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:18:03,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:18:03,656 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:18:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:03,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:18:03,733 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:18:03,733 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:18:03,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:18:03,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:18:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:07,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:18:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:12,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:18:12,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 183 [2019-01-11 14:18:12,018 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:18:12,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2019-01-11 14:18:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2019-01-11 14:18:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-11 14:18:12,021 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 168 states. [2019-01-11 14:18:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:18:12,603 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2019-01-11 14:18:12,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-01-11 14:18:12,603 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 249 [2019-01-11 14:18:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:18:12,604 INFO L225 Difference]: With dead ends: 255 [2019-01-11 14:18:12,604 INFO L226 Difference]: Without dead ends: 254 [2019-01-11 14:18:12,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 330 SyntacticMatches, 66 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-11 14:18:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-01-11 14:18:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2019-01-11 14:18:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-01-11 14:18:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2019-01-11 14:18:12,610 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 249 [2019-01-11 14:18:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:18:12,610 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2019-01-11 14:18:12,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2019-01-11 14:18:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2019-01-11 14:18:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-01-11 14:18:12,611 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:18:12,611 INFO L402 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1] [2019-01-11 14:18:12,612 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:18:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:18:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash -542241652, now seen corresponding path program 83 times [2019-01-11 14:18:12,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:18:12,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:12,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:18:12,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:12,613 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:18:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:15,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:15,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:18:15,819 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:18:15,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:18:15,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:15,819 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:18:15,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:18:15,827 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:18:16,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-01-11 14:18:16,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:18:16,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:18:16,271 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:18:16,271 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:18:16,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:18:16,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:18:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:20,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:18:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:24,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:18:24,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 184 [2019-01-11 14:18:24,611 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:18:24,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2019-01-11 14:18:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2019-01-11 14:18:24,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-11 14:18:24,613 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 170 states. [2019-01-11 14:18:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:18:25,231 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2019-01-11 14:18:25,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-01-11 14:18:25,231 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 252 [2019-01-11 14:18:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:18:25,233 INFO L225 Difference]: With dead ends: 258 [2019-01-11 14:18:25,233 INFO L226 Difference]: Without dead ends: 257 [2019-01-11 14:18:25,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 334 SyntacticMatches, 68 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26798 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-11 14:18:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-01-11 14:18:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-01-11 14:18:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-01-11 14:18:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2019-01-11 14:18:25,238 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 252 [2019-01-11 14:18:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:18:25,239 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2019-01-11 14:18:25,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2019-01-11 14:18:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2019-01-11 14:18:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-01-11 14:18:25,240 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:18:25,240 INFO L402 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1] [2019-01-11 14:18:25,240 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:18:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:18:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash -549012960, now seen corresponding path program 84 times [2019-01-11 14:18:25,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:18:25,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:25,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:18:25,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:25,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:18:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:28,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:28,759 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:18:28,759 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:18:28,759 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:18:28,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:28,759 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:18:28,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:18:28,768 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:18:28,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:18:28,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:18:28,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:18:28,870 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:18:28,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:18:28,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:18:28,880 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:18:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:33,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:18:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:37,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:18:37,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 185 [2019-01-11 14:18:37,526 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:18:37,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2019-01-11 14:18:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2019-01-11 14:18:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-11 14:18:37,529 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 172 states. [2019-01-11 14:18:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:18:38,189 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2019-01-11 14:18:38,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-01-11 14:18:38,189 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 255 [2019-01-11 14:18:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:18:38,191 INFO L225 Difference]: With dead ends: 261 [2019-01-11 14:18:38,191 INFO L226 Difference]: Without dead ends: 260 [2019-01-11 14:18:38,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 338 SyntacticMatches, 70 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27295 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-11 14:18:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-01-11 14:18:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-01-11 14:18:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-01-11 14:18:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2019-01-11 14:18:38,197 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 255 [2019-01-11 14:18:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:18:38,197 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2019-01-11 14:18:38,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2019-01-11 14:18:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2019-01-11 14:18:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-01-11 14:18:38,198 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:18:38,199 INFO L402 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1] [2019-01-11 14:18:38,199 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:18:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:18:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -409586676, now seen corresponding path program 85 times [2019-01-11 14:18:38,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:18:38,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:38,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:18:38,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:38,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:18:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:42,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:42,001 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:18:42,001 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:18:42,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:18:42,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:42,002 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:18:42,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:18:42,012 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:18:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:42,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:18:42,093 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:18:42,093 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:18:42,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:18:42,105 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:18:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:46,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:18:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:50,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:18:50,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 186 [2019-01-11 14:18:50,587 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:18:50,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2019-01-11 14:18:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2019-01-11 14:18:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-11 14:18:50,590 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 174 states. [2019-01-11 14:18:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:18:51,283 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2019-01-11 14:18:51,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-01-11 14:18:51,284 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 258 [2019-01-11 14:18:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:18:51,285 INFO L225 Difference]: With dead ends: 264 [2019-01-11 14:18:51,285 INFO L226 Difference]: Without dead ends: 263 [2019-01-11 14:18:51,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 342 SyntacticMatches, 72 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27792 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-11 14:18:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-01-11 14:18:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2019-01-11 14:18:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2019-01-11 14:18:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2019-01-11 14:18:51,290 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 258 [2019-01-11 14:18:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:18:51,290 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2019-01-11 14:18:51,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2019-01-11 14:18:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2019-01-11 14:18:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-01-11 14:18:51,292 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:18:51,292 INFO L402 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1] [2019-01-11 14:18:51,292 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:18:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:18:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash 5464736, now seen corresponding path program 86 times [2019-01-11 14:18:51,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:18:51,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:51,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:18:51,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:18:51,293 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:18:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:18:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:54,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:54,958 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:18:54,958 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:18:54,958 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:18:54,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:18:54,959 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:18:54,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:18:54,967 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:18:55,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2019-01-11 14:18:55,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:18:55,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:18:55,441 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:18:55,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:18:55,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:18:55,449 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:18:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:18:59,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:19:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:03,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:19:03,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 187 [2019-01-11 14:19:03,874 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:19:03,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2019-01-11 14:19:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2019-01-11 14:19:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-11 14:19:03,877 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 176 states. [2019-01-11 14:19:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:19:04,558 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2019-01-11 14:19:04,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-01-11 14:19:04,558 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 261 [2019-01-11 14:19:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:19:04,559 INFO L225 Difference]: With dead ends: 267 [2019-01-11 14:19:04,559 INFO L226 Difference]: Without dead ends: 266 [2019-01-11 14:19:04,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 346 SyntacticMatches, 74 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28289 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-11 14:19:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-01-11 14:19:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-01-11 14:19:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-01-11 14:19:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2019-01-11 14:19:04,565 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 261 [2019-01-11 14:19:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:19:04,565 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2019-01-11 14:19:04,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2019-01-11 14:19:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2019-01-11 14:19:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-01-11 14:19:04,566 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:19:04,566 INFO L402 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1] [2019-01-11 14:19:04,566 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:19:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:19:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -408765556, now seen corresponding path program 87 times [2019-01-11 14:19:04,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:19:04,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:04,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:19:04,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:04,567 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:19:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:19:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:08,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:08,283 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:19:08,283 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:19:08,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:19:08,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:08,284 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:19:08,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:19:08,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:19:08,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:19:08,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:19:08,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:19:08,394 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:19:08,395 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:19:08,405 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:19:08,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:19:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:12,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:19:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:17,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:19:17,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 188 [2019-01-11 14:19:17,079 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:19:17,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2019-01-11 14:19:17,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2019-01-11 14:19:17,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-11 14:19:17,081 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 178 states. [2019-01-11 14:19:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:19:17,778 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2019-01-11 14:19:17,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-01-11 14:19:17,778 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 264 [2019-01-11 14:19:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:19:17,780 INFO L225 Difference]: With dead ends: 270 [2019-01-11 14:19:17,780 INFO L226 Difference]: Without dead ends: 269 [2019-01-11 14:19:17,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 350 SyntacticMatches, 76 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28786 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-11 14:19:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-01-11 14:19:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2019-01-11 14:19:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-01-11 14:19:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-01-11 14:19:17,785 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 264 [2019-01-11 14:19:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:19:17,785 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-01-11 14:19:17,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2019-01-11 14:19:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-01-11 14:19:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-01-11 14:19:17,786 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:19:17,787 INFO L402 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1] [2019-01-11 14:19:17,787 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:19:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:19:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353120, now seen corresponding path program 88 times [2019-01-11 14:19:17,787 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:19:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:17,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:19:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:17,788 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:19:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:19:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:21,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:21,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:19:21,394 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:19:21,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:19:21,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:21,394 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:19:21,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:19:21,402 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:19:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:19:21,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:19:21,483 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:19:21,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:19:21,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:19:21,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:19:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:26,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:19:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:30,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:19:30,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 189 [2019-01-11 14:19:30,485 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:19:30,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-01-11 14:19:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-01-11 14:19:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-11 14:19:30,487 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 180 states. [2019-01-11 14:19:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:19:31,246 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2019-01-11 14:19:31,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-01-11 14:19:31,247 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 267 [2019-01-11 14:19:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:19:31,248 INFO L225 Difference]: With dead ends: 273 [2019-01-11 14:19:31,248 INFO L226 Difference]: Without dead ends: 272 [2019-01-11 14:19:31,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 354 SyntacticMatches, 78 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29283 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-11 14:19:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-01-11 14:19:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2019-01-11 14:19:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2019-01-11 14:19:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2019-01-11 14:19:31,253 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 267 [2019-01-11 14:19:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:19:31,253 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2019-01-11 14:19:31,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-01-11 14:19:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2019-01-11 14:19:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-01-11 14:19:31,254 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:19:31,255 INFO L402 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1] [2019-01-11 14:19:31,255 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:19:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:19:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1962171636, now seen corresponding path program 89 times [2019-01-11 14:19:31,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:19:31,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:31,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:19:31,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:31,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:19:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:19:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:35,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:35,202 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:19:35,202 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:19:35,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:19:35,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:35,203 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:19:35,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:19:35,211 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:19:35,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2019-01-11 14:19:35,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:19:35,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:19:35,725 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:19:35,725 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:19:35,734 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:19:35,735 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:19:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:40,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:19:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:44,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:19:44,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 190 [2019-01-11 14:19:44,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:19:44,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2019-01-11 14:19:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2019-01-11 14:19:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-11 14:19:44,901 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 182 states. [2019-01-11 14:19:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:19:45,638 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2019-01-11 14:19:45,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-01-11 14:19:45,639 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 270 [2019-01-11 14:19:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:19:45,641 INFO L225 Difference]: With dead ends: 276 [2019-01-11 14:19:45,641 INFO L226 Difference]: Without dead ends: 275 [2019-01-11 14:19:45,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 358 SyntacticMatches, 80 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29780 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-11 14:19:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-01-11 14:19:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2019-01-11 14:19:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-01-11 14:19:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 274 transitions. [2019-01-11 14:19:45,646 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 274 transitions. Word has length 270 [2019-01-11 14:19:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:19:45,646 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 274 transitions. [2019-01-11 14:19:45,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2019-01-11 14:19:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 274 transitions. [2019-01-11 14:19:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-01-11 14:19:45,647 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:19:45,648 INFO L402 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1] [2019-01-11 14:19:45,648 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:19:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:19:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -550268000, now seen corresponding path program 90 times [2019-01-11 14:19:45,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:19:45,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:45,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:19:45,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:45,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:19:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:19:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:49,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:49,581 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:19:49,581 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:19:49,581 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:19:49,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:19:49,581 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:19:49,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:19:49,590 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:19:49,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:19:49,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:19:49,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:19:49,692 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:19:49,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:19:49,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:19:49,702 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:19:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:54,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:19:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:19:59,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:19:59,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 191 [2019-01-11 14:19:59,030 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:19:59,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2019-01-11 14:19:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2019-01-11 14:19:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-11 14:19:59,032 INFO L87 Difference]: Start difference. First operand 274 states and 274 transitions. Second operand 184 states. [2019-01-11 14:19:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:19:59,757 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2019-01-11 14:19:59,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-01-11 14:19:59,757 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 273 [2019-01-11 14:19:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:19:59,759 INFO L225 Difference]: With dead ends: 279 [2019-01-11 14:19:59,759 INFO L226 Difference]: Without dead ends: 278 [2019-01-11 14:19:59,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 362 SyntacticMatches, 82 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30277 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-11 14:19:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-01-11 14:19:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2019-01-11 14:19:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-01-11 14:19:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2019-01-11 14:19:59,765 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 273 [2019-01-11 14:19:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:19:59,765 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2019-01-11 14:19:59,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2019-01-11 14:19:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2019-01-11 14:19:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-01-11 14:19:59,766 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:19:59,766 INFO L402 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1] [2019-01-11 14:19:59,767 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:19:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:19:59,767 INFO L82 PathProgramCache]: Analyzing trace with hash 856222348, now seen corresponding path program 91 times [2019-01-11 14:19:59,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:19:59,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:59,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:19:59,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:19:59,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:19:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:03,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:03,831 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:20:03,831 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:20:03,831 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:20:03,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:03,831 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:20:03,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:20:03,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:20:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:03,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:20:03,925 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:20:03,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:20:03,937 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:20:03,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:20:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:08,457 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:20:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:12,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:20:12,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 192 [2019-01-11 14:20:12,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:20:12,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-01-11 14:20:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-01-11 14:20:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-11 14:20:12,938 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 186 states. [2019-01-11 14:20:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:20:13,681 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2019-01-11 14:20:13,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-01-11 14:20:13,684 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 276 [2019-01-11 14:20:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:20:13,685 INFO L225 Difference]: With dead ends: 282 [2019-01-11 14:20:13,685 INFO L226 Difference]: Without dead ends: 281 [2019-01-11 14:20:13,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 366 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30774 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-11 14:20:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-01-11 14:20:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2019-01-11 14:20:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-01-11 14:20:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2019-01-11 14:20:13,690 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 276 [2019-01-11 14:20:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:20:13,690 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2019-01-11 14:20:13,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-01-11 14:20:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2019-01-11 14:20:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-01-11 14:20:13,691 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:20:13,692 INFO L402 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1] [2019-01-11 14:20:13,692 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:20:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:20:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -90760160, now seen corresponding path program 92 times [2019-01-11 14:20:13,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:20:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:13,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:20:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:13,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:20:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:17,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:17,773 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:20:17,773 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:20:17,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:20:17,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:17,773 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:20:17,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:20:17,782 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:20:18,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2019-01-11 14:20:18,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:20:18,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:20:18,335 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:20:18,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:20:18,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:20:18,346 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:20:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:23,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:20:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:27,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:20:27,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 193 [2019-01-11 14:20:27,697 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:20:27,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2019-01-11 14:20:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2019-01-11 14:20:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-11 14:20:27,700 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 188 states. [2019-01-11 14:20:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:20:28,473 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2019-01-11 14:20:28,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-01-11 14:20:28,474 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 279 [2019-01-11 14:20:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:20:28,475 INFO L225 Difference]: With dead ends: 285 [2019-01-11 14:20:28,475 INFO L226 Difference]: Without dead ends: 284 [2019-01-11 14:20:28,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 370 SyntacticMatches, 86 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-11 14:20:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-01-11 14:20:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2019-01-11 14:20:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2019-01-11 14:20:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2019-01-11 14:20:28,482 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 279 [2019-01-11 14:20:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:20:28,483 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2019-01-11 14:20:28,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2019-01-11 14:20:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2019-01-11 14:20:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-01-11 14:20:28,484 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:20:28,484 INFO L402 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1] [2019-01-11 14:20:28,484 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:20:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:20:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1993511436, now seen corresponding path program 93 times [2019-01-11 14:20:28,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:20:28,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:28,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:20:28,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:28,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:20:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:32,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:32,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:20:32,619 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:20:32,620 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:20:32,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:32,620 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:20:32,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:20:32,642 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:20:32,735 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:20:32,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:20:32,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:20:32,746 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:20:32,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:20:32,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:20:32,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:20:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:37,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:20:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:42,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:20:42,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 194 [2019-01-11 14:20:42,040 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:20:42,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2019-01-11 14:20:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2019-01-11 14:20:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-11 14:20:42,043 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 190 states. [2019-01-11 14:20:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:20:42,840 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2019-01-11 14:20:42,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-01-11 14:20:42,841 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 282 [2019-01-11 14:20:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:20:42,842 INFO L225 Difference]: With dead ends: 288 [2019-01-11 14:20:42,842 INFO L226 Difference]: Without dead ends: 287 [2019-01-11 14:20:42,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 374 SyntacticMatches, 88 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31768 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-11 14:20:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-01-11 14:20:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2019-01-11 14:20:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-01-11 14:20:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2019-01-11 14:20:42,847 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 282 [2019-01-11 14:20:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:20:42,847 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2019-01-11 14:20:42,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2019-01-11 14:20:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2019-01-11 14:20:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-01-11 14:20:42,848 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:20:42,849 INFO L402 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1] [2019-01-11 14:20:42,849 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:20:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:20:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2108537696, now seen corresponding path program 94 times [2019-01-11 14:20:42,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:20:42,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:42,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:20:42,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:42,850 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:20:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:47,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:47,087 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:20:47,087 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:20:47,087 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:20:47,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:20:47,087 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:20:47,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:20:47,096 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:20:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:20:47,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:20:47,181 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:20:47,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:20:47,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:20:47,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:20:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:52,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:20:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:20:56,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:20:56,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 195 [2019-01-11 14:20:56,650 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:20:56,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-01-11 14:20:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-01-11 14:20:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-11 14:20:56,653 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 192 states. [2019-01-11 14:20:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:20:57,335 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2019-01-11 14:20:57,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-01-11 14:20:57,336 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 285 [2019-01-11 14:20:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:20:57,337 INFO L225 Difference]: With dead ends: 291 [2019-01-11 14:20:57,337 INFO L226 Difference]: Without dead ends: 290 [2019-01-11 14:20:57,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 378 SyntacticMatches, 90 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32265 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-11 14:20:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-01-11 14:20:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2019-01-11 14:20:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-01-11 14:20:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2019-01-11 14:20:57,343 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 285 [2019-01-11 14:20:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:20:57,344 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2019-01-11 14:20:57,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-01-11 14:20:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2019-01-11 14:20:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-01-11 14:20:57,345 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:20:57,345 INFO L402 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1] [2019-01-11 14:20:57,345 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:20:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:20:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1549756020, now seen corresponding path program 95 times [2019-01-11 14:20:57,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:20:57,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:57,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:20:57,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:20:57,346 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:20:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:21:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:01,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:01,684 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:21:01,684 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:21:01,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:21:01,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:01,684 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:21:01,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:21:01,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:21:02,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2019-01-11 14:21:02,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:21:02,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:21:02,293 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:21:02,293 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:21:02,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:21:02,304 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:21:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:07,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:21:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:11,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:21:11,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 196 [2019-01-11 14:21:11,925 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:21:11,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-01-11 14:21:11,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-01-11 14:21:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-11 14:21:11,928 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 194 states. [2019-01-11 14:21:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:21:12,727 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2019-01-11 14:21:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-01-11 14:21:12,727 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 288 [2019-01-11 14:21:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:21:12,729 INFO L225 Difference]: With dead ends: 294 [2019-01-11 14:21:12,729 INFO L226 Difference]: Without dead ends: 293 [2019-01-11 14:21:12,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 382 SyntacticMatches, 92 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32762 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-11 14:21:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-01-11 14:21:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2019-01-11 14:21:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2019-01-11 14:21:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2019-01-11 14:21:12,737 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 288 [2019-01-11 14:21:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:21:12,737 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2019-01-11 14:21:12,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-01-11 14:21:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2019-01-11 14:21:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2019-01-11 14:21:12,739 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:21:12,739 INFO L402 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1] [2019-01-11 14:21:12,739 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:21:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:21:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2116881696, now seen corresponding path program 96 times [2019-01-11 14:21:12,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:21:12,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:12,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:21:12,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:12,740 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:21:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:21:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:17,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:17,250 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:21:17,250 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:21:17,250 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:21:17,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:17,250 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:21:17,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:21:17,258 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:21:17,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:21:17,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:21:17,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:21:17,373 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:21:17,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:21:17,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:21:17,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:21:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:22,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:21:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:27,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:21:27,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 197 [2019-01-11 14:21:27,213 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:21:27,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-01-11 14:21:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-01-11 14:21:27,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-11 14:21:27,216 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 196 states. [2019-01-11 14:21:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:21:27,884 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2019-01-11 14:21:27,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-01-11 14:21:27,885 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 291 [2019-01-11 14:21:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:21:27,886 INFO L225 Difference]: With dead ends: 297 [2019-01-11 14:21:27,886 INFO L226 Difference]: Without dead ends: 296 [2019-01-11 14:21:27,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 386 SyntacticMatches, 94 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33259 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-11 14:21:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-01-11 14:21:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2019-01-11 14:21:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-01-11 14:21:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2019-01-11 14:21:27,892 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 291 [2019-01-11 14:21:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:21:27,892 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2019-01-11 14:21:27,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-01-11 14:21:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2019-01-11 14:21:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-01-11 14:21:27,893 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:21:27,894 INFO L402 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1] [2019-01-11 14:21:27,894 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:21:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:21:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1017839884, now seen corresponding path program 97 times [2019-01-11 14:21:27,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:21:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:27,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:21:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:27,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:21:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:21:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:32,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:32,436 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:21:32,436 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:21:32,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:21:32,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:32,436 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:21:32,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:21:32,447 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:21:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:21:32,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:21:32,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:21:32,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:21:32,549 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:21:32,549 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:21:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:38,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:21:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:42,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:21:42,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 198 [2019-01-11 14:21:42,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:21:42,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-01-11 14:21:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-01-11 14:21:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-11 14:21:42,359 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 198 states. [2019-01-11 14:21:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:21:43,210 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2019-01-11 14:21:43,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-01-11 14:21:43,210 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 294 [2019-01-11 14:21:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:21:43,211 INFO L225 Difference]: With dead ends: 300 [2019-01-11 14:21:43,212 INFO L226 Difference]: Without dead ends: 299 [2019-01-11 14:21:43,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 390 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-11 14:21:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-01-11 14:21:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2019-01-11 14:21:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2019-01-11 14:21:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2019-01-11 14:21:43,219 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 294 [2019-01-11 14:21:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:21:43,219 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2019-01-11 14:21:43,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-01-11 14:21:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2019-01-11 14:21:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-01-11 14:21:43,220 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:21:43,220 INFO L402 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1] [2019-01-11 14:21:43,220 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:21:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:21:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1084000, now seen corresponding path program 98 times [2019-01-11 14:21:43,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:21:43,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:43,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:21:43,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:43,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:21:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:21:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:47,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:47,833 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:21:47,833 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:21:47,833 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:21:47,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:21:47,833 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:21:47,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-11 14:21:47,842 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-11 14:21:48,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2019-01-11 14:21:48,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:21:48,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:21:48,465 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:21:48,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:21:48,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:21:48,483 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:21:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:54,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:21:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:21:58,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:21:58,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 199 [2019-01-11 14:21:58,656 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:21:58,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-01-11 14:21:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-01-11 14:21:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-11 14:21:58,659 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 200 states. [2019-01-11 14:21:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:21:59,528 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2019-01-11 14:21:59,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-01-11 14:21:59,528 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 297 [2019-01-11 14:21:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:21:59,529 INFO L225 Difference]: With dead ends: 303 [2019-01-11 14:21:59,530 INFO L226 Difference]: Without dead ends: 302 [2019-01-11 14:21:59,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 394 SyntacticMatches, 98 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34253 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-11 14:21:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-01-11 14:21:59,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2019-01-11 14:21:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-01-11 14:21:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2019-01-11 14:21:59,536 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 297 [2019-01-11 14:21:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:21:59,536 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2019-01-11 14:21:59,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-01-11 14:21:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2019-01-11 14:21:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2019-01-11 14:21:59,537 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:21:59,537 INFO L402 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1] [2019-01-11 14:21:59,537 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:21:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:21:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2066335884, now seen corresponding path program 99 times [2019-01-11 14:21:59,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:21:59,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:59,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:21:59,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:21:59,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:21:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:22:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:04,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:22:04,397 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:22:04,397 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:22:04,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:22:04,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:22:04,397 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:22:04,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-11 14:22:04,405 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-11 14:22:04,529 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-11 14:22:04,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-11 14:22:04,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:22:04,560 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-11 14:22:04,561 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:22:04,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:22:04,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-11 14:22:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:10,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:22:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:14,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:22:14,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 200 [2019-01-11 14:22:14,715 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:22:14,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-01-11 14:22:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-01-11 14:22:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-11 14:22:14,718 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 202 states. [2019-01-11 14:22:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:22:15,474 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-01-11 14:22:15,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-11 14:22:15,474 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 300 [2019-01-11 14:22:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:22:15,475 INFO L225 Difference]: With dead ends: 306 [2019-01-11 14:22:15,475 INFO L226 Difference]: Without dead ends: 305 [2019-01-11 14:22:15,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 399 SyntacticMatches, 99 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34551 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-11 14:22:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-01-11 14:22:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2019-01-11 14:22:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-01-11 14:22:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2019-01-11 14:22:15,481 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 300 [2019-01-11 14:22:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:22:15,481 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2019-01-11 14:22:15,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-01-11 14:22:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2019-01-11 14:22:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-01-11 14:22:15,482 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:22:15,483 INFO L402 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1] [2019-01-11 14:22:15,483 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:22:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:22:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1553891808, now seen corresponding path program 100 times [2019-01-11 14:22:15,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:22:15,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:22:15,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-11 14:22:15,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:22:15,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:22:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:22:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 14752 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:20,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:22:20,063 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:22:20,063 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-11 14:22:20,063 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-11 14:22:20,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:22:20,063 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:22:20,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:22:20,088 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:22:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:22:20,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:22:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:20,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:22:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:22:24,688 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-01-11 14:22:24,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102, 102] imperfect sequences [102] total 103 [2019-01-11 14:22:24,688 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:22:24,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-01-11 14:22:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-01-11 14:22:24,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-01-11 14:22:24,690 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 103 states. [2019-01-11 14:22:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:22:25,415 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-01-11 14:22:25,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-11 14:22:25,416 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 303 [2019-01-11 14:22:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:22:25,417 INFO L225 Difference]: With dead ends: 306 [2019-01-11 14:22:25,417 INFO L226 Difference]: Without dead ends: 0 [2019-01-11 14:22:25,419 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 504 SyntacticMatches, 100 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-01-11 14:22:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-11 14:22:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-11 14:22:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-11 14:22:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-11 14:22:25,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 303 [2019-01-11 14:22:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:22:25,420 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-11 14:22:25,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-01-11 14:22:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-11 14:22:25,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-11 14:22:25,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-11 14:22:25,543 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 511 [2019-01-11 14:22:28,677 WARN L181 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 511 DAG size of output: 509 [2019-01-11 14:22:28,684 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 2 23) no Hoare annotation was computed. [2019-01-11 14:22:28,684 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 2 23) no Hoare annotation was computed. [2019-01-11 14:22:28,684 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-01-11 14:22:28,684 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2019-01-11 14:22:28,687 INFO L444 ceAbstractionStarter]: At program point L12-1(lines 12 21) the Hoare annotation is: (let ((.cse0 (<= 400 (select |#length| main_q.base)))) (or (and (<= main_q.offset 112) (<= (+ main_p.offset 112) main_q.offset) .cse0) (and (<= main_q.offset 260) (<= (+ main_p.offset 260) main_q.offset) .cse0) (and (<= (+ main_p.offset 128) main_q.offset) (<= main_q.offset 128) .cse0) (and (<= (+ main_p.offset 196) main_q.offset) (<= main_q.offset 196) .cse0) (and (<= main_q.offset 124) (<= (+ main_p.offset 124) main_q.offset) .cse0) (and (<= (+ main_p.offset 308) main_q.offset) (<= main_q.offset 308) .cse0) (and (<= main_q.offset 240) (<= (+ main_p.offset 240) main_q.offset) .cse0) (and (<= main_q.offset 332) (<= (+ main_p.offset 332) main_q.offset) .cse0) (and (<= (+ main_p.offset 296) main_q.offset) (<= main_q.offset 296) .cse0) (and (<= (+ main_p.offset 268) main_q.offset) (<= main_q.offset 268) .cse0) (and (<= main_q.offset 160) (<= (+ main_p.offset 160) main_q.offset) .cse0) (and (<= main_q.offset 180) (<= (+ main_p.offset 180) main_q.offset) .cse0) (and (<= (+ main_p.offset 368) main_q.offset) (<= main_q.offset 368) .cse0) (and (<= main_q.offset 384) (<= (+ main_p.offset 384) main_q.offset) .cse0) (and (<= main_q.offset 392) (<= (+ main_p.offset 392) main_q.offset) .cse0) (and (<= main_q.offset 144) .cse0 (<= (+ main_p.offset 144) main_q.offset)) (and (<= main_q.offset 200) (<= (+ main_p.offset 200) main_q.offset) .cse0) (and (<= (+ main_p.offset 288) main_q.offset) (<= main_q.offset 288) .cse0) (and (<= main_q.offset 340) (<= (+ main_p.offset 340) main_q.offset) .cse0) (and (<= main_q.offset 356) (<= (+ main_p.offset 356) main_q.offset) .cse0) (and (<= (+ main_p.offset 276) main_q.offset) (<= main_q.offset 276) .cse0) (and (<= main_q.offset 336) (<= (+ main_p.offset 336) main_q.offset) .cse0) (and (<= (+ main_p.offset 140) main_q.offset) (<= main_q.offset 140) .cse0) (and (<= main_q.offset 244) (<= (+ main_p.offset 244) main_q.offset) .cse0) (and (<= (+ main_p.offset 396) main_q.offset) (<= main_q.offset 396) .cse0) (and (<= (+ main_p.offset 312) main_q.offset) (<= main_q.offset 312) .cse0) (and (<= main_q.offset 148) (<= (+ main_p.offset 148) main_q.offset) .cse0) (and (<= (+ main_p.offset 352) main_q.offset) (<= main_q.offset 352) .cse0) (and (<= main_q.offset 344) (<= (+ main_p.offset 344) main_q.offset) .cse0) (and (<= main_q.offset 164) (<= (+ main_p.offset 164) main_q.offset) .cse0) (and (<= (+ main_p.offset 304) main_q.offset) (<= main_q.offset 304) .cse0) (and (<= main_q.offset 320) (<= (+ main_p.offset 320) main_q.offset) .cse0) (and (<= (+ main_p.offset 36) main_q.offset) (<= main_q.offset 36) .cse0) (and (<= (+ main_p.offset 44) main_q.offset) (<= main_q.offset 44) .cse0) (and (<= (+ main_p.offset 228) main_q.offset) (<= main_q.offset 228) .cse0) (and (<= main_p.offset main_q.offset) (<= main_q.offset 0) .cse0) (and (<= (+ main_p.offset 284) main_q.offset) (<= main_q.offset 284) .cse0) (and (<= (+ main_p.offset 188) main_q.offset) (<= main_q.offset 188) .cse0) (and (<= (+ main_p.offset 8) main_q.offset) (<= main_q.offset 8) .cse0) (and (<= main_q.offset 348) .cse0 (<= (+ main_p.offset 348) main_q.offset)) (<= (+ main_p.offset 400) main_q.offset) (and (<= (+ main_p.offset 224) main_q.offset) (<= main_q.offset 224) .cse0) (and (<= (+ main_p.offset 120) main_q.offset) (<= main_q.offset 120) .cse0) (and (<= main_q.offset 232) (<= (+ main_p.offset 232) main_q.offset) .cse0) (and (<= main_q.offset 92) (<= (+ main_p.offset 92) main_q.offset) .cse0) (and (<= main_q.offset 236) (<= (+ main_p.offset 236) main_q.offset) .cse0) (and (<= (+ main_p.offset 328) main_q.offset) (<= main_q.offset 328) .cse0) (and (<= main_q.offset 12) (<= (+ main_p.offset 12) main_q.offset) .cse0) (and (<= (+ main_p.offset 64) main_q.offset) (<= main_q.offset 64) .cse0) (and (<= (+ main_p.offset 192) main_q.offset) (<= main_q.offset 192) .cse0) (and (<= (+ main_p.offset 104) main_q.offset) (<= main_q.offset 104) .cse0) (and (<= main_q.offset 280) (<= (+ main_p.offset 280) main_q.offset) .cse0) (and (<= (+ main_p.offset 316) main_q.offset) (<= main_q.offset 316) .cse0) (and (<= main_q.offset 152) (<= (+ main_p.offset 152) main_q.offset) .cse0) (and (<= (+ main_p.offset 248) main_q.offset) (<= main_q.offset 248) .cse0) (and (<= main_q.offset 28) (<= (+ main_p.offset 28) main_q.offset) .cse0) (and (<= (+ main_p.offset 68) main_q.offset) (<= main_q.offset 68) .cse0) (and (<= main_q.offset 4) .cse0 (<= (+ main_p.offset 4) main_q.offset)) (and (<= (+ main_p.offset 204) main_q.offset) (<= main_q.offset 204) .cse0) (and (<= main_q.offset 380) (<= (+ main_p.offset 380) main_q.offset) .cse0) (and (<= main_q.offset 52) (<= (+ main_p.offset 52) main_q.offset) .cse0) (and (<= (+ main_p.offset 172) main_q.offset) (<= main_q.offset 172) .cse0) (and (<= main_q.offset 56) (<= (+ main_p.offset 56) main_q.offset) .cse0) (and (<= main_q.offset 60) (<= (+ main_p.offset 60) main_q.offset) .cse0) (and (<= main_q.offset 100) (<= (+ main_p.offset 100) main_q.offset) .cse0) (and (<= main_q.offset 208) (<= (+ main_p.offset 208) main_q.offset) .cse0) (and (<= (+ main_p.offset 220) main_q.offset) (<= main_q.offset 220) .cse0) (and (<= (+ main_p.offset 132) main_q.offset) (<= main_q.offset 132) .cse0) (and (<= main_q.offset 176) (<= (+ main_p.offset 176) main_q.offset) .cse0) (and (<= main_q.offset 116) (<= (+ main_p.offset 116) main_q.offset) .cse0) (and (<= (+ main_p.offset 136) main_q.offset) (<= main_q.offset 136) .cse0) (and (<= main_q.offset 184) (<= (+ main_p.offset 184) main_q.offset) .cse0) (and (<= main_q.offset 20) (<= (+ main_p.offset 20) main_q.offset) .cse0) (and (<= (+ main_p.offset 216) main_q.offset) (<= main_q.offset 216) .cse0) (and (<= (+ main_p.offset 376) main_q.offset) (<= main_q.offset 376) .cse0) (and (<= (+ main_p.offset 324) main_q.offset) (<= main_q.offset 324) .cse0) (and (<= (+ main_p.offset 72) main_q.offset) (<= main_q.offset 72) .cse0) (and (<= main_q.offset 76) (<= (+ main_p.offset 76) main_q.offset) .cse0) (and (<= main_q.offset 16) (<= (+ main_p.offset 16) main_q.offset) .cse0) (and (<= main_q.offset 84) (<= (+ main_p.offset 84) main_q.offset) .cse0) (and (<= (+ main_p.offset 364) main_q.offset) (<= main_q.offset 364) .cse0) (and (<= (+ main_p.offset 156) main_q.offset) (<= main_q.offset 156) .cse0) (and (<= (+ main_p.offset 88) main_q.offset) .cse0 (<= main_q.offset 88)) (and (<= main_q.offset 168) (<= (+ main_p.offset 168) main_q.offset) .cse0) (and (<= (+ main_p.offset 48) main_q.offset) (<= main_q.offset 48) .cse0) (and (<= main_q.offset 252) (<= (+ main_p.offset 252) main_q.offset) .cse0) (and (<= (+ main_p.offset 264) main_q.offset) (<= main_q.offset 264) .cse0) (and (<= (+ main_p.offset 388) main_q.offset) (<= main_q.offset 388) .cse0) (and (<= main_q.offset 256) (<= (+ main_p.offset 256) main_q.offset) .cse0) (and (<= (+ main_p.offset 40) main_q.offset) (<= main_q.offset 40) .cse0) (and (<= main_q.offset 300) .cse0 (<= (+ main_p.offset 300) main_q.offset)) (and (<= (+ main_p.offset 80) main_q.offset) (<= main_q.offset 80) .cse0) (and (<= main_q.offset 108) .cse0 (<= (+ main_p.offset 108) main_q.offset)) (and (<= main_q.offset 212) (<= (+ main_p.offset 212) main_q.offset) .cse0) (and (<= main_q.offset 372) (<= (+ main_p.offset 372) main_q.offset) .cse0) (and (<= (+ main_p.offset 96) main_q.offset) .cse0 (<= main_q.offset 96)) (and (<= (+ main_p.offset 272) main_q.offset) (<= main_q.offset 272) .cse0) (and (<= main_q.offset 292) (<= (+ main_p.offset 292) main_q.offset) .cse0) (and (<= (+ main_p.offset 360) main_q.offset) (<= main_q.offset 360) .cse0) (and (<= main_q.offset 32) (<= (+ main_p.offset 32) main_q.offset) .cse0) (and (<= (+ main_p.offset 24) main_q.offset) (<= main_q.offset 24) .cse0))) [2019-01-11 14:22:28,687 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 2 23) no Hoare annotation was computed. [2019-01-11 14:22:28,687 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 15) no Hoare annotation was computed. [2019-01-11 14:22:28,760 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:22:28 BoogieIcfgContainer [2019-01-11 14:22:28,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-11 14:22:28,761 INFO L168 Benchmark]: Toolchain (without parser) took 710658.63 ms. Allocated memory was 141.6 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 108.7 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2019-01-11 14:22:28,762 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory is still 109.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 14:22:28,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.08 ms. Allocated memory is still 141.6 MB. Free memory was 108.7 MB in the beginning and 106.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-01-11 14:22:28,764 INFO L168 Benchmark]: Boogie Preprocessor took 22.44 ms. Allocated memory is still 141.6 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:22:28,764 INFO L168 Benchmark]: RCFGBuilder took 294.64 ms. Allocated memory is still 141.6 MB. Free memory was 105.2 MB in the beginning and 95.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-01-11 14:22:28,764 INFO L168 Benchmark]: TraceAbstraction took 710284.25 ms. Allocated memory was 141.6 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 95.2 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2019-01-11 14:22:28,767 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 0.22 ms. Allocated memory is still 141.6 MB. Free memory is still 109.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 53.08 ms. Allocated memory is still 141.6 MB. Free memory was 108.7 MB in the beginning and 106.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.44 ms. Allocated memory is still 141.6 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.64 ms. Allocated memory is still 141.6 MB. Free memory was 105.2 MB in the beginning and 95.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 710284.25 ms. Allocated memory was 141.6 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 95.2 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((q!offset <= 112 && p!offset + 112 <= q!offset) && 400 <= #length[q!base]) || ((q!offset <= 260 && p!offset + 260 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 128 <= q!offset && q!offset <= 128) && 400 <= #length[q!base])) || ((p!offset + 196 <= q!offset && q!offset <= 196) && 400 <= #length[q!base])) || ((q!offset <= 124 && p!offset + 124 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 308 <= q!offset && q!offset <= 308) && 400 <= #length[q!base])) || ((q!offset <= 240 && p!offset + 240 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 332 && p!offset + 332 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 296 <= q!offset && q!offset <= 296) && 400 <= #length[q!base])) || ((p!offset + 268 <= q!offset && q!offset <= 268) && 400 <= #length[q!base])) || ((q!offset <= 160 && p!offset + 160 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 180 && p!offset + 180 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 368 <= q!offset && q!offset <= 368) && 400 <= #length[q!base])) || ((q!offset <= 384 && p!offset + 384 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 392 && p!offset + 392 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 144 && 400 <= #length[q!base]) && p!offset + 144 <= q!offset)) || ((q!offset <= 200 && p!offset + 200 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 288 <= q!offset && q!offset <= 288) && 400 <= #length[q!base])) || ((q!offset <= 340 && p!offset + 340 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 356 && p!offset + 356 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 276 <= q!offset && q!offset <= 276) && 400 <= #length[q!base])) || ((q!offset <= 336 && p!offset + 336 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 140 <= q!offset && q!offset <= 140) && 400 <= #length[q!base])) || ((q!offset <= 244 && p!offset + 244 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 396 <= q!offset && q!offset <= 396) && 400 <= #length[q!base])) || ((p!offset + 312 <= q!offset && q!offset <= 312) && 400 <= #length[q!base])) || ((q!offset <= 148 && p!offset + 148 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 352 <= q!offset && q!offset <= 352) && 400 <= #length[q!base])) || ((q!offset <= 344 && p!offset + 344 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 164 && p!offset + 164 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 304 <= q!offset && q!offset <= 304) && 400 <= #length[q!base])) || ((q!offset <= 320 && p!offset + 320 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 36 <= q!offset && q!offset <= 36) && 400 <= #length[q!base])) || ((p!offset + 44 <= q!offset && q!offset <= 44) && 400 <= #length[q!base])) || ((p!offset + 228 <= q!offset && q!offset <= 228) && 400 <= #length[q!base])) || ((p!offset <= q!offset && q!offset <= 0) && 400 <= #length[q!base])) || ((p!offset + 284 <= q!offset && q!offset <= 284) && 400 <= #length[q!base])) || ((p!offset + 188 <= q!offset && q!offset <= 188) && 400 <= #length[q!base])) || ((p!offset + 8 <= q!offset && q!offset <= 8) && 400 <= #length[q!base])) || ((q!offset <= 348 && 400 <= #length[q!base]) && p!offset + 348 <= q!offset)) || p!offset + 400 <= q!offset) || ((p!offset + 224 <= q!offset && q!offset <= 224) && 400 <= #length[q!base])) || ((p!offset + 120 <= q!offset && q!offset <= 120) && 400 <= #length[q!base])) || ((q!offset <= 232 && p!offset + 232 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 92 && p!offset + 92 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 236 && p!offset + 236 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 328 <= q!offset && q!offset <= 328) && 400 <= #length[q!base])) || ((q!offset <= 12 && p!offset + 12 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 64 <= q!offset && q!offset <= 64) && 400 <= #length[q!base])) || ((p!offset + 192 <= q!offset && q!offset <= 192) && 400 <= #length[q!base])) || ((p!offset + 104 <= q!offset && q!offset <= 104) && 400 <= #length[q!base])) || ((q!offset <= 280 && p!offset + 280 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 316 <= q!offset && q!offset <= 316) && 400 <= #length[q!base])) || ((q!offset <= 152 && p!offset + 152 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 248 <= q!offset && q!offset <= 248) && 400 <= #length[q!base])) || ((q!offset <= 28 && p!offset + 28 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 68 <= q!offset && q!offset <= 68) && 400 <= #length[q!base])) || ((q!offset <= 4 && 400 <= #length[q!base]) && p!offset + 4 <= q!offset)) || ((p!offset + 204 <= q!offset && q!offset <= 204) && 400 <= #length[q!base])) || ((q!offset <= 380 && p!offset + 380 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 52 && p!offset + 52 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 172 <= q!offset && q!offset <= 172) && 400 <= #length[q!base])) || ((q!offset <= 56 && p!offset + 56 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 60 && p!offset + 60 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 100 && p!offset + 100 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 208 && p!offset + 208 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 220 <= q!offset && q!offset <= 220) && 400 <= #length[q!base])) || ((p!offset + 132 <= q!offset && q!offset <= 132) && 400 <= #length[q!base])) || ((q!offset <= 176 && p!offset + 176 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 116 && p!offset + 116 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 136 <= q!offset && q!offset <= 136) && 400 <= #length[q!base])) || ((q!offset <= 184 && p!offset + 184 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 20 && p!offset + 20 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 216 <= q!offset && q!offset <= 216) && 400 <= #length[q!base])) || ((p!offset + 376 <= q!offset && q!offset <= 376) && 400 <= #length[q!base])) || ((p!offset + 324 <= q!offset && q!offset <= 324) && 400 <= #length[q!base])) || ((p!offset + 72 <= q!offset && q!offset <= 72) && 400 <= #length[q!base])) || ((q!offset <= 76 && p!offset + 76 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 16 && p!offset + 16 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 84 && p!offset + 84 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 364 <= q!offset && q!offset <= 364) && 400 <= #length[q!base])) || ((p!offset + 156 <= q!offset && q!offset <= 156) && 400 <= #length[q!base])) || ((p!offset + 88 <= q!offset && 400 <= #length[q!base]) && q!offset <= 88)) || ((q!offset <= 168 && p!offset + 168 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 48 <= q!offset && q!offset <= 48) && 400 <= #length[q!base])) || ((q!offset <= 252 && p!offset + 252 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 264 <= q!offset && q!offset <= 264) && 400 <= #length[q!base])) || ((p!offset + 388 <= q!offset && q!offset <= 388) && 400 <= #length[q!base])) || ((q!offset <= 256 && p!offset + 256 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 40 <= q!offset && q!offset <= 40) && 400 <= #length[q!base])) || ((q!offset <= 300 && 400 <= #length[q!base]) && p!offset + 300 <= q!offset)) || ((p!offset + 80 <= q!offset && q!offset <= 80) && 400 <= #length[q!base])) || ((q!offset <= 108 && 400 <= #length[q!base]) && p!offset + 108 <= q!offset)) || ((q!offset <= 212 && p!offset + 212 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 372 && p!offset + 372 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 96 <= q!offset && 400 <= #length[q!base]) && q!offset <= 96)) || ((p!offset + 272 <= q!offset && q!offset <= 272) && 400 <= #length[q!base])) || ((q!offset <= 292 && p!offset + 292 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 360 <= q!offset && q!offset <= 360) && 400 <= #length[q!base])) || ((q!offset <= 32 && p!offset + 32 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 24 <= q!offset && q!offset <= 24) && 400 <= #length[q!base]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 710.1s OverallTime, 101 OverallIterations, 101 TraceHistogramMax, 40.5s AutomataDifference, 0.0s DeadEndRemovalTime, 3.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 202 SDtfs, 7321 SDslu, 1 SDs, 0 SdLazy, 27597 SolverSat, 353 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35852 GetRequests, 20503 SyntacticMatches, 2649 SemanticMatches, 12700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303168 ImplicationChecksByTransitivity, 621.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=304occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 101 MinimizatonAttempts, 100 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1404 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 12.4s SatisfiabilityAnalysisTime, 644.7s InterpolantComputationTime, 30903 NumberOfCodeBlocks, 30903 NumberOfCodeBlocksAsserted, 1884 NumberOfCheckSat, 46052 ConstructedInterpolants, 0 QuantifiedInterpolants, 70702786 SizeOfPredicates, 596 NumberOfNonLiveVariables, 32500 ConjunctsInSsa, 15942 ConjunctsInUnsatCore, 301 InterpolantComputations, 3 PerfectInterpolantSequences, 44852/1530150 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...