java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 13:59:35,370 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 13:59:35,373 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 13:59:35,391 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-24 13:59:35,444 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 [2018-12-24 13:59:35,459 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 13:59:35,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 13:59:35,460 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 13:59:35,460 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 13:59:35,460 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 13:59:35,460 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 13:59:35,461 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 13:59:35,461 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 13:59:35,461 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 13:59:35,461 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 13:59:35,461 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 13:59:35,462 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 13:59:35,462 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 13:59:35,462 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 13:59:35,466 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 13:59:35,466 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 13:59:35,466 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 13:59:35,466 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 13:59:35,467 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 13:59:35,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 13:59:35,470 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 13:59:35,470 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 13:59:35,470 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 13:59:35,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 13:59:35,471 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 13:59:35,472 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 13:59:35,472 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:35,472 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 13:59:35,473 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 13:59:35,473 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 13:59:35,473 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 13:59:35,473 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 13:59:35,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 13:59:35,474 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 13:59:35,474 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 13:59:35,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 13:59:35,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 13:59:35,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 13:59:35,534 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 13:59:35,535 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 13:59:35,535 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl [2018-12-24 13:59:35,536 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl' [2018-12-24 13:59:35,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 13:59:35,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 13:59:35,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:35,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 13:59:35,591 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 13:59:35,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:35,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 13:59:35,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 13:59:35,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 13:59:35,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... [2018-12-24 13:59:35,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 13:59:35,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 13:59:35,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 13:59:35,695 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 13:59:35,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 13:59:35,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 13:59:36,222 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 13:59:36,222 INFO L280 CfgBuilder]: Removed 15 assue(true) statements. [2018-12-24 13:59:36,223 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:36 BoogieIcfgContainer [2018-12-24 13:59:36,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 13:59:36,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 13:59:36,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 13:59:36,233 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 13:59:36,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:35" (1/2) ... [2018-12-24 13:59:36,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464c164b and model type speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 01:59:36, skipping insertion in model container [2018-12-24 13:59:36,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:36" (2/2) ... [2018-12-24 13:59:36,244 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-limited.bpl [2018-12-24 13:59:36,267 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 13:59:36,277 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-24 13:59:36,296 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-24 13:59:36,333 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 13:59:36,333 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 13:59:36,333 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 13:59:36,334 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 13:59:36,334 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 13:59:36,334 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 13:59:36,334 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 13:59:36,334 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 13:59:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-24 13:59:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 13:59:36,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:36,359 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 13:59:36,362 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2018-12-24 13:59:36,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,419 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:36,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:36,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:36,561 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:36,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:36,581 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2018-12-24 13:59:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:36,818 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2018-12-24 13:59:36,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:36,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 13:59:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:36,836 INFO L225 Difference]: With dead ends: 29 [2018-12-24 13:59:36,836 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 13:59:36,839 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 [2018-12-24 13:59:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 13:59:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2018-12-24 13:59:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-24 13:59:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2018-12-24 13:59:36,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2018-12-24 13:59:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:36,881 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2018-12-24 13:59:36,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2018-12-24 13:59:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:36,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:36,882 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:36,883 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2018-12-24 13:59:36,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:36,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,885 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,164 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-12-24 13:59:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:37,180 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:37,182 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2018-12-24 13:59:37,217 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:37,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:37,308 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:37,309 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:37,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:37,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:37,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,316 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 [2018-12-24 13:59:37,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:37,330 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:37,565 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-12-24 13:59:37,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:37,602 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:37,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:37,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:37,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:37,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,887 INFO L303 Elim1Store]: Index analysis took 118 ms [2018-12-24 13:59:37,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:37,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,017 INFO L303 Elim1Store]: Index analysis took 121 ms [2018-12-24 13:59:38,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:38,022 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,267 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,356 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,378 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,420 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,450 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:38,486 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:38,674 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-12-24 13:59:38,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,887 INFO L303 Elim1Store]: Index analysis took 193 ms [2018-12-24 13:59:38,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:38,891 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:39,036 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:39,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:39,172 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:39,175 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2018-12-24 13:59:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:41,197 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2018-12-24 13:59:41,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:41,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:41,199 INFO L225 Difference]: With dead ends: 47 [2018-12-24 13:59:41,199 INFO L226 Difference]: Without dead ends: 45 [2018-12-24 13:59:41,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-24 13:59:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2018-12-24 13:59:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 13:59:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2018-12-24 13:59:41,214 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2018-12-24 13:59:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:41,214 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2018-12-24 13:59:41,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2018-12-24 13:59:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:41,215 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:41,215 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:41,216 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2018-12-24 13:59:41,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:41,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:41,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,220 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:41,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:41,290 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:41,290 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2018-12-24 13:59:41,293 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:41,293 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:41,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:41,305 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:41,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:41,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,306 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 [2018-12-24 13:59:41,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:41,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:41,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:41,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:41,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:41,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:41,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:41,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:41,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:41,506 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,606 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,680 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,722 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,739 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,755 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:41,788 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,830 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:41,831 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 7 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:41,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:41,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,077 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,078 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 13:59:42,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 13:59:42,140 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:42,141 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2018-12-24 13:59:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:42,251 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2018-12-24 13:59:42,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 13:59:42,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 13:59:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:42,254 INFO L225 Difference]: With dead ends: 23 [2018-12-24 13:59:42,254 INFO L226 Difference]: Without dead ends: 22 [2018-12-24 13:59:42,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-24 13:59:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-24 13:59:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-24 13:59:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2018-12-24 13:59:42,261 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2018-12-24 13:59:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:42,261 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2018-12-24 13:59:42,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2018-12-24 13:59:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:42,262 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:42,262 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:42,262 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2018-12-24 13:59:42,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:42,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:42,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:42,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:42,264 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:42,362 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:42,362 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:42,362 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2018-12-24 13:59:42,364 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:42,364 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:42,372 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:42,372 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:42,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:42,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:42,373 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 [2018-12-24 13:59:42,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:42,385 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:42,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:42,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:42,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:42,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:42,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:42,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:42,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:42,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:42,603 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,655 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,676 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,694 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,708 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,721 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,780 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,780 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:42,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:42,831 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,910 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,910 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:43,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:43,024 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:43,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:43,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:43,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:43,026 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2018-12-24 13:59:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:44,549 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2018-12-24 13:59:44,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:44,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:44,551 INFO L225 Difference]: With dead ends: 50 [2018-12-24 13:59:44,551 INFO L226 Difference]: Without dead ends: 47 [2018-12-24 13:59:44,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-24 13:59:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-12-24 13:59:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-24 13:59:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 74 transitions. [2018-12-24 13:59:44,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 74 transitions. Word has length 3 [2018-12-24 13:59:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:44,562 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 74 transitions. [2018-12-24 13:59:44,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 74 transitions. [2018-12-24 13:59:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:44,563 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:44,563 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:44,563 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2018-12-24 13:59:44,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:44,565 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:44,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:44,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:44,691 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2018-12-24 13:59:44,694 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:44,694 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:44,702 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:44,703 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:44,703 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:44,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:44,704 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 [2018-12-24 13:59:44,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:44,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:44,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:44,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:44,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:44,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:44,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:44,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:44,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:44,895 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,943 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,984 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,037 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,052 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,064 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:45,113 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,139 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:45,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:45,236 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,358 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:45,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:45,496 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:45,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:45,497 INFO L87 Difference]: Start difference. First operand 24 states and 74 transitions. Second operand 6 states. [2018-12-24 13:59:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:46,486 INFO L93 Difference]: Finished difference Result 50 states and 108 transitions. [2018-12-24 13:59:46,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:46,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:46,488 INFO L225 Difference]: With dead ends: 50 [2018-12-24 13:59:46,488 INFO L226 Difference]: Without dead ends: 48 [2018-12-24 13:59:46,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-24 13:59:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2018-12-24 13:59:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 13:59:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 87 transitions. [2018-12-24 13:59:46,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 87 transitions. Word has length 3 [2018-12-24 13:59:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:46,498 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 87 transitions. [2018-12-24 13:59:46,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 87 transitions. [2018-12-24 13:59:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:46,498 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:46,499 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:46,499 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2018-12-24 13:59:46,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:46,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:46,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,501 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:46,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:46,619 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:46,619 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2018-12-24 13:59:46,620 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:46,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:46,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:46,628 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:46,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:46,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,629 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 [2018-12-24 13:59:46,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:46,641 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:46,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:46,733 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:46,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:46,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:46,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:46,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:46,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:46,977 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,250 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,285 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,314 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,338 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,360 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:47,396 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,422 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:47,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:47,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,549 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:47,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 13:59:47,615 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,707 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2018-12-24 13:59:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:47,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:47,914 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:47,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:47,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:47,915 INFO L87 Difference]: Start difference. First operand 26 states and 87 transitions. Second operand 8 states. [2018-12-24 13:59:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:50,767 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2018-12-24 13:59:50,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:50,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:50,770 INFO L225 Difference]: With dead ends: 62 [2018-12-24 13:59:50,770 INFO L226 Difference]: Without dead ends: 58 [2018-12-24 13:59:50,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-24 13:59:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2018-12-24 13:59:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 13:59:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 105 transitions. [2018-12-24 13:59:50,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 105 transitions. Word has length 4 [2018-12-24 13:59:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:50,780 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 105 transitions. [2018-12-24 13:59:50,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 105 transitions. [2018-12-24 13:59:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:50,781 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:50,781 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:50,781 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2018-12-24 13:59:50,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:50,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:50,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:50,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:50,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:50,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:50,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:50,886 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:50,886 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2018-12-24 13:59:50,887 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:50,887 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:50,896 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:50,897 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:50,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:50,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:50,897 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 [2018-12-24 13:59:50,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:50,906 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:50,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:50,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:50,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:50,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:51,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:51,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:51,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:51,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:51,042 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,085 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,111 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,131 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,146 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,159 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:51,187 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:51,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:51,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:51,317 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:51,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,375 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:51,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 13:59:51,378 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,455 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:51,456 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:46 [2018-12-24 13:59:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:51,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:51,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:51,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:51,698 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:51,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:51,699 INFO L87 Difference]: Start difference. First operand 30 states and 105 transitions. Second operand 8 states. [2018-12-24 13:59:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:54,572 INFO L93 Difference]: Finished difference Result 60 states and 147 transitions. [2018-12-24 13:59:54,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:54,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:54,574 INFO L225 Difference]: With dead ends: 60 [2018-12-24 13:59:54,574 INFO L226 Difference]: Without dead ends: 56 [2018-12-24 13:59:54,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-24 13:59:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2018-12-24 13:59:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 13:59:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2018-12-24 13:59:54,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2018-12-24 13:59:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:54,587 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2018-12-24 13:59:54,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2018-12-24 13:59:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:54,587 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:54,587 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:54,588 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2018-12-24 13:59:54,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:54,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:54,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:54,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:54,589 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:54,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:54,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:54,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:54,691 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2018-12-24 13:59:54,693 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:54,693 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:54,698 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:54,699 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:54,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:54,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:54,699 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:54,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:54,710 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:54,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:54,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:54,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:54,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:54,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:54,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:54,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:54,865 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,904 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,926 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,943 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,958 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,971 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:55,002 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,025 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,026 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:55,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:55,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,143 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:55,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,204 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:55,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 13:59:55,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:46 [2018-12-24 13:59:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:55,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:55,470 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:55,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:55,471 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2018-12-24 13:59:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:58,227 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2018-12-24 13:59:58,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:58,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:58,229 INFO L225 Difference]: With dead ends: 57 [2018-12-24 13:59:58,229 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:58,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-12-24 13:59:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 13:59:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2018-12-24 13:59:58,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2018-12-24 13:59:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:58,238 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2018-12-24 13:59:58,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2018-12-24 13:59:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:58,238 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:58,239 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:58,239 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2018-12-24 13:59:58,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:58,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:58,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:58,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:58,240 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:58,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:58,328 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:58,328 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:58,329 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2018-12-24 13:59:58,330 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:58,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:58,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:58,336 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:58,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:58,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:58,336 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 [2018-12-24 13:59:58,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:58,347 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:58,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:58,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 13:59:58,406 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:58,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:58,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:58,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:58,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:58,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:58,484 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,641 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,664 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,683 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,698 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,712 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,738 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2018-12-24 13:59:58,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:58,786 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 13:59:58,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 13:59:58,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,975 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,976 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2018-12-24 13:59:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:59,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:59,178 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:59,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:59,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:59,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:59,179 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2018-12-24 14:00:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:01,300 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2018-12-24 14:00:01,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:01,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:01,303 INFO L225 Difference]: With dead ends: 57 [2018-12-24 14:00:01,303 INFO L226 Difference]: Without dead ends: 53 [2018-12-24 14:00:01,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-24 14:00:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2018-12-24 14:00:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-24 14:00:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2018-12-24 14:00:01,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2018-12-24 14:00:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:01,313 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2018-12-24 14:00:01,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2018-12-24 14:00:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:01,313 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,314 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:01,314 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2018-12-24 14:00:01,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,315 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:01,398 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:01,398 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2018-12-24 14:00:01,399 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:01,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:01,405 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:01,405 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:01,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,406 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 [2018-12-24 14:00:01,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,416 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:01,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 14:00:01,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:01,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:01,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:01,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:01,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:01,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:01,589 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,628 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,649 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,666 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,677 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,690 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,712 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,713 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2018-12-24 14:00:01,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:01,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,830 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:01,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:00:01,890 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,956 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:02,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:02,089 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:02,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:02,090 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2018-12-24 14:00:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:03,813 INFO L93 Difference]: Finished difference Result 77 states and 200 transitions. [2018-12-24 14:00:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:03,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:03,815 INFO L225 Difference]: With dead ends: 77 [2018-12-24 14:00:03,815 INFO L226 Difference]: Without dead ends: 75 [2018-12-24 14:00:03,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-24 14:00:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2018-12-24 14:00:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:00:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 159 transitions. [2018-12-24 14:00:03,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 159 transitions. Word has length 4 [2018-12-24 14:00:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:03,826 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 159 transitions. [2018-12-24 14:00:03,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 159 transitions. [2018-12-24 14:00:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:03,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:03,827 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:03,828 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 930058, now seen corresponding path program 1 times [2018-12-24 14:00:03,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:03,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:03,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:03,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:03,918 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [27] [2018-12-24 14:00:03,919 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:03,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:03,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:03,925 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:03,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:03,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,925 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 [2018-12-24 14:00:03,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:03,943 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:04,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:04,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:04,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:04,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:04,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:04,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:04,075 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,115 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,139 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,156 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,171 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,184 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 14:00:04,213 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,236 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2018-12-24 14:00:04,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:04,282 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,352 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,353 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:04,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:04,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,463 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:04,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:04,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:04,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:04,928 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:04,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:04,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:04,929 INFO L87 Difference]: Start difference. First operand 38 states and 159 transitions. Second operand 8 states. [2018-12-24 14:00:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:06,683 INFO L93 Difference]: Finished difference Result 82 states and 241 transitions. [2018-12-24 14:00:06,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:06,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:06,687 INFO L225 Difference]: With dead ends: 82 [2018-12-24 14:00:06,687 INFO L226 Difference]: Without dead ends: 79 [2018-12-24 14:00:06,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-24 14:00:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 46. [2018-12-24 14:00:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-24 14:00:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 209 transitions. [2018-12-24 14:00:06,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 209 transitions. Word has length 4 [2018-12-24 14:00:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:06,700 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 209 transitions. [2018-12-24 14:00:06,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 209 transitions. [2018-12-24 14:00:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:06,701 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:06,702 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:06,702 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2018-12-24 14:00:06,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:06,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:06,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:06,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:06,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:06,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:06,793 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:06,794 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2018-12-24 14:00:06,795 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:06,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:06,805 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:06,805 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:06,806 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:06,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:06,806 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 [2018-12-24 14:00:06,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:06,819 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:06,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:06,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 14:00:06,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:06,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:06,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:06,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 46 [2018-12-24 14:00:06,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 60 [2018-12-24 14:00:06,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 75 [2018-12-24 14:00:06,933 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,968 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,990 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,007 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,023 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,035 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,063 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:42, output treesize:47 [2018-12-24 14:00:09,105 WARN L181 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2018-12-24 14:00:09,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:09,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:00:09,717 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 5 xjuncts. [2018-12-24 14:00:09,717 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:196 [2018-12-24 14:00:20,799 WARN L181 SmtUtils]: Spent 10.95 s on a formula simplification that was a NOOP. DAG size: 106 [2018-12-24 14:00:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:20,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:20,852 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:20,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:20,853 INFO L87 Difference]: Start difference. First operand 46 states and 209 transitions. Second operand 6 states. [2018-12-24 14:00:53,568 WARN L181 SmtUtils]: Spent 32.66 s on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2018-12-24 14:00:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:57,865 INFO L93 Difference]: Finished difference Result 59 states and 225 transitions. [2018-12-24 14:00:57,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:57,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:00:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:57,866 INFO L225 Difference]: With dead ends: 59 [2018-12-24 14:00:57,866 INFO L226 Difference]: Without dead ends: 58 [2018-12-24 14:00:57,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-24 14:00:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2018-12-24 14:00:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-24 14:00:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 216 transitions. [2018-12-24 14:00:57,876 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 216 transitions. Word has length 4 [2018-12-24 14:00:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:57,876 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 216 transitions. [2018-12-24 14:00:57,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 216 transitions. [2018-12-24 14:00:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:57,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:57,877 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:57,878 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2018-12-24 14:00:57,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:57,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:57,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:57,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:57,879 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:58,331 WARN L181 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2018-12-24 14:00:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:58,364 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:58,364 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2018-12-24 14:00:58,365 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:58,366 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:58,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:58,371 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:58,371 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:58,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,372 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 [2018-12-24 14:00:58,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:58,387 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:58,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:58,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:58,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:58,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:58,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:58,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:58,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:58,521 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,562 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,585 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,603 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,616 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,628 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-24 14:00:58,655 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,680 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2018-12-24 14:00:58,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:58,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:58,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:58,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,006 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:59,007 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2018-12-24 14:00:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:59,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:59,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:59,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:59,219 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:59,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:59,220 INFO L87 Difference]: Start difference. First operand 48 states and 216 transitions. Second operand 8 states. [2018-12-24 14:00:59,950 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:00:59,952 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2018-12-24 14:00:59,955 INFO L168 Benchmark]: Toolchain (without parser) took 84367.12 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 938.5 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -739.4 MB). Peak memory consumption was 199.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:00:59,956 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:00:59,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:00:59,957 INFO L168 Benchmark]: Boogie Preprocessor took 39.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:00:59,958 INFO L168 Benchmark]: RCFGBuilder took 528.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:00:59,958 INFO L168 Benchmark]: TraceAbstraction took 83726.45 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 938.5 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -760.6 MB). Peak memory consumption was 177.9 MB. Max. memory is 7.1 GB. [2018-12-24 14:00:59,960 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 64.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 528.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 83726.45 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 938.5 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -760.6 MB). Peak memory consumption was 177.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...