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-8-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1de736e-m [2019-02-18 09:39:00,925 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-18 09:39:00,927 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-18 09:39:00,938 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-18 09:39:00,971 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-02-18 09:39:00,983 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-18 09:39:00,984 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-18 09:39:00,984 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-18 09:39:00,985 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-18 09:39:00,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-18 09:39:00,985 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-18 09:39:00,985 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-18 09:39:00,985 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-18 09:39:00,986 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-18 09:39:00,986 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-18 09:39:00,986 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-18 09:39:00,986 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-18 09:39:00,986 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-18 09:39:00,987 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-18 09:39:00,987 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-18 09:39:00,987 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-18 09:39:00,988 INFO L133 SettingsManager]: * Use SBE=true [2019-02-18 09:39:00,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-18 09:39:00,988 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-18 09:39:00,988 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-18 09:39:00,988 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-18 09:39:00,989 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-18 09:39:00,990 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-18 09:39:00,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-18 09:39:00,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-18 09:39:00,990 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-18 09:39:00,990 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 09:39:00,991 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-18 09:39:00,991 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-18 09:39:00,991 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-18 09:39:00,991 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-18 09:39:00,991 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-18 09:39:00,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-02-18 09:39:00,992 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-18 09:39:00,992 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-18 09:39:01,020 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-18 09:39:01,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-18 09:39:01,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-18 09:39:01,042 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-18 09:39:01,042 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-18 09:39:01,043 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl [2019-02-18 09:39:01,043 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl' [2019-02-18 09:39:01,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-18 09:39:01,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-18 09:39:01,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:01,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-18 09:39:01,090 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-18 09:39:01,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:01,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-18 09:39:01,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-18 09:39:01,149 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-18 09:39:01,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-18 09:39:01,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-18 09:39:01,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-18 09:39:01,184 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-18 09:39:01,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 09:39:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-18 09:39:01,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-18 09:39:01,631 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-18 09:39:01,631 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-02-18 09:39:01,633 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:01 BoogieIcfgContainer [2019-02-18 09:39:01,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-18 09:39:01,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-18 09:39:01,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-18 09:39:01,638 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-18 09:39:01,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/2) ... [2019-02-18 09:39:01,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0065ed and model type speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:39:01, skipping insertion in model container [2019-02-18 09:39:01,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:01" (2/2) ... [2019-02-18 09:39:01,642 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-limited.bpl [2019-02-18 09:39:01,651 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-18 09:39:01,660 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-02-18 09:39:01,673 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-02-18 09:39:01,701 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-18 09:39:01,701 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-18 09:39:01,701 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-18 09:39:01,701 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-18 09:39:01,702 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-18 09:39:01,702 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-18 09:39:01,703 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-18 09:39:01,703 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-18 09:39:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-02-18 09:39:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-18 09:39:01,722 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:01,723 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-18 09:39:01,726 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-02-18 09:39:01,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:01,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:01,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:01,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:01,778 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:01,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:39:01,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:39:01,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:01,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:39:01,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:39:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:39:01,937 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-02-18 09:39:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:02,195 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-02-18 09:39:02,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:39:02,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-18 09:39:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:02,214 INFO L225 Difference]: With dead ends: 37 [2019-02-18 09:39:02,214 INFO L226 Difference]: Without dead ends: 32 [2019-02-18 09:39:02,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:39:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-18 09:39:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-02-18 09:39:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-18 09:39:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-02-18 09:39:02,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-02-18 09:39:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:02,257 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-02-18 09:39:02,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:39:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-02-18 09:39:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:02,258 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:02,258 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:02,259 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-02-18 09:39:02,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,261 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:02,564 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-02-18 09:39:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:02,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:02,592 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:02,593 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:02,595 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-02-18 09:39:02,632 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:02,632 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:02,718 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:02,720 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:02,725 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:02,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:02,725 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:39:02,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:02,738 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:02,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:03,243 WARN L181 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-02-18 09:39:03,264 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 27 treesize of output 30 [2019-02-18 09:39:03,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,277 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 30 treesize of output 36 [2019-02-18 09:39:03,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,298 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 32 treesize of output 46 [2019-02-18 09:39:03,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,341 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 34 treesize of output 60 [2019-02-18 09:39:03,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,408 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 36 treesize of output 78 [2019-02-18 09:39:03,423 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,433 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,438 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:03,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,548 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-02-18 09:39:03,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:03,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,581 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:39:03,594 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:03,960 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,217 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,269 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,310 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,346 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,379 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,406 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-02-18 09:39:04,507 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 48 treesize of output 40 [2019-02-18 09:39:04,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-02-18 09:39:04,561 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 43 treesize of output 62 [2019-02-18 09:39:04,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,672 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-02-18 09:39:04,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 09:39:04,869 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-02-18 09:39:04,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 09:39:04,920 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,925 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,927 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,933 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,939 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,941 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,976 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:04,977 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-02-18 09:39:05,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:39:05,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:05,341 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:05,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-02-18 09:39:16,043 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-02-18 09:39:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:16,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:16,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:16,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:16,096 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:16,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:16,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-02-18 09:39:16,097 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-02-18 09:42:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:42:02,726 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-02-18 09:42:02,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:42:02,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:42:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:42:02,730 INFO L225 Difference]: With dead ends: 63 [2019-02-18 09:42:02,730 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 09:42:02,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=31, Invalid=40, Unknown=1, NotChecked=0, Total=72 [2019-02-18 09:42:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 09:42:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-02-18 09:42:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-18 09:42:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-02-18 09:42:02,738 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-02-18 09:42:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:42:02,738 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-02-18 09:42:02,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:42:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-02-18 09:42:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:42:02,739 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:42:02,739 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:42:02,739 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:42:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:42:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-02-18 09:42:02,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:42:02,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:42:02,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:42:02,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:42:02,741 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:42:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:42:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:42:02,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:42:02,848 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:42:02,849 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:42:02,849 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-02-18 09:42:02,850 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:42:02,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:42:02,864 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:42:02,865 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:42:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:42:02,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:42:02,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:42:02,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:42:02,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:42:02,876 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:42:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:42:02,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:42:02,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:42:03,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,002 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 30 treesize of output 36 [2019-02-18 09:42:03,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,014 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 32 treesize of output 46 [2019-02-18 09:42:03,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,029 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 34 treesize of output 60 [2019-02-18 09:42:03,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,083 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 36 treesize of output 78 [2019-02-18 09:42:03,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,105 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:42:03,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,256 INFO L303 Elim1Store]: Index analysis took 147 ms [2019-02-18 09:42:03,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:42:03,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,365 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-02-18 09:42:03,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:42:03,369 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,572 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,620 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,665 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,700 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,747 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,855 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,876 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:03,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:03,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-02-18 09:42:03,965 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 48 treesize of output 40 [2019-02-18 09:42:04,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,107 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-02-18 09:42:04,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-02-18 09:42:04,113 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 43 treesize of output 62 [2019-02-18 09:42:04,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 09:42:04,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 09:42:04,230 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,236 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,253 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,258 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,260 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,262 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:42:04,299 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-02-18 09:42:04,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:42:04,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-02-18 09:42:04,402 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:42:04,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:42:04,526 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-02-18 09:42:15,190 WARN L181 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-02-18 09:42:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:42:15,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:42:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:42:15,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:42:15,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:42:15,222 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:42:15,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:42:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:42:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-02-18 09:42:15,223 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-02-18 09:44:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:44:59,066 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-02-18 09:44:59,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:44:59,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:44:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:44:59,067 INFO L225 Difference]: With dead ends: 62 [2019-02-18 09:44:59,068 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 09:44:59,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=31, Invalid=40, Unknown=1, NotChecked=0, Total=72 [2019-02-18 09:44:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 09:44:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-02-18 09:44:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 09:44:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-02-18 09:44:59,075 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-02-18 09:44:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:44:59,075 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-02-18 09:44:59,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:44:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-02-18 09:44:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:44:59,076 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:44:59,076 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:44:59,077 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:44:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:44:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-02-18 09:44:59,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:44:59,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:44:59,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:44:59,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:44:59,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:44:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:44:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:44:59,116 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:44:59,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:44:59,117 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:44:59,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:44:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:44:59,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:44:59,117 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-02-18 09:44:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:44:59,190 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-02-18 09:44:59,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:44:59,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-18 09:44:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:44:59,191 INFO L225 Difference]: With dead ends: 31 [2019-02-18 09:44:59,191 INFO L226 Difference]: Without dead ends: 30 [2019-02-18 09:44:59,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:44:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-18 09:44:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-02-18 09:44:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 09:44:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-02-18 09:44:59,199 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-02-18 09:44:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:44:59,199 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-02-18 09:44:59,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:44:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-02-18 09:44:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:44:59,200 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:44:59,200 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:44:59,200 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:44:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:44:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-02-18 09:44:59,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:44:59,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:44:59,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:44:59,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:44:59,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:44:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:44:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:44:59,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:44:59,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:44:59,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:44:59,260 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-02-18 09:44:59,261 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:44:59,261 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:44:59,275 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:44:59,276 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:44:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:44:59,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:44:59,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:44:59,276 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:44:59,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:44:59,289 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:44:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:44:59,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:44:59,589 WARN L181 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-02-18 09:44:59,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 41 [2019-02-18 09:44:59,603 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 37 treesize of output 32 [2019-02-18 09:44:59,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,654 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 28 treesize of output 42 [2019-02-18 09:44:59,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,663 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 30 treesize of output 56 [2019-02-18 09:44:59,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,701 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 32 treesize of output 74 [2019-02-18 09:44:59,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 09:44:59,752 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,758 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,760 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,761 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,769 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,772 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,795 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 27 treesize of output 30 [2019-02-18 09:44:59,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,800 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 30 treesize of output 36 [2019-02-18 09:44:59,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,807 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 32 treesize of output 46 [2019-02-18 09:44:59,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,816 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 34 treesize of output 60 [2019-02-18 09:44:59,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,843 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 36 treesize of output 78 [2019-02-18 09:44:59,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,860 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:44:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:44:59,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:44:59,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:44:59,907 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:44:59,994 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,042 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,083 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,110 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,134 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,155 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,171 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,207 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:45:00,207 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:80, output treesize:62 [2019-02-18 09:45:00,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,238 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:45:00,270 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:45:00,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:45:00,397 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-02-18 09:45:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:45:00,484 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:45:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:45:00,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 09:45:00,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 09:45:00,510 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:45:00,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 09:45:00,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 09:45:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:45:00,511 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-02-18 09:45:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:45:00,594 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-02-18 09:45:00,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 09:45:00,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-18 09:45:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:45:00,596 INFO L225 Difference]: With dead ends: 32 [2019-02-18 09:45:00,596 INFO L226 Difference]: Without dead ends: 31 [2019-02-18 09:45:00,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:45:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-02-18 09:45:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-02-18 09:45:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 09:45:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-02-18 09:45:00,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-02-18 09:45:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:45:00,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-02-18 09:45:00,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 09:45:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-02-18 09:45:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:45:00,607 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:45:00,607 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:45:00,607 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:45:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:45:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-02-18 09:45:00,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:45:00,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:45:00,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:45:00,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:45:00,609 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:45:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:45:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:45:00,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:45:00,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:45:00,678 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:45:00,678 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-02-18 09:45:00,682 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:45:00,682 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:45:00,690 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:45:00,691 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:45:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:45:00,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:45:00,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:45:00,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:45:00,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:45:00,701 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:45:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:45:00,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:45:00,847 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-02-18 09:45:00,851 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 27 treesize of output 30 [2019-02-18 09:45:00,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,856 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 30 treesize of output 36 [2019-02-18 09:45:00,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,864 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 32 treesize of output 46 [2019-02-18 09:45:00,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,872 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 34 treesize of output 60 [2019-02-18 09:45:00,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,884 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 36 treesize of output 78 [2019-02-18 09:45:00,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,899 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:45:00,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,984 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,985 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:00,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:45:01,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,098 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-02-18 09:45:01,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:45:01,102 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,201 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,262 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,312 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,353 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,383 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,409 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-02-18 09:45:01,504 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 48 treesize of output 40 [2019-02-18 09:45:01,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-02-18 09:45:01,560 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 43 treesize of output 62 [2019-02-18 09:45:01,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 09:45:01,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 09:45:01,680 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,683 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,685 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,686 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,688 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,691 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:45:01,728 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-02-18 09:45:01,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:45:01,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:45:01,833 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:45:01,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:45:01,981 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-02-18 09:45:12,615 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-02-18 09:45:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:45:12,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:45:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:45:12,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:45:12,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:45:12,660 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:45:12,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:45:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:45:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-02-18 09:45:12,661 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states.