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-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1de736e-m [2019-02-18 09:39:28,041 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-18 09:39:28,043 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-18 09:39:28,054 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-18 09:39:28,055 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-18 09:39:28,056 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-18 09:39:28,057 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-18 09:39:28,059 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-18 09:39:28,061 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-18 09:39:28,062 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-18 09:39:28,063 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-18 09:39:28,091 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 09:39:28,112 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-18 09:39:28,112 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-18 09:39:28,114 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-18 09:39:28,114 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-18 09:39:28,114 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-18 09:39:28,114 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-18 09:39:28,114 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-18 09:39:28,115 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-18 09:39:28,115 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-18 09:39:28,115 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-18 09:39:28,115 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-18 09:39:28,115 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-18 09:39:28,116 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-18 09:39:28,118 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-18 09:39:28,119 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-18 09:39:28,119 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-18 09:39:28,119 INFO L133 SettingsManager]: * Use SBE=true [2019-02-18 09:39:28,119 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-18 09:39:28,120 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-18 09:39:28,122 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-18 09:39:28,122 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-18 09:39:28,123 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-18 09:39:28,123 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-18 09:39:28,123 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-18 09:39:28,123 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-18 09:39:28,123 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-18 09:39:28,124 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 09:39:28,124 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-18 09:39:28,124 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-18 09:39:28,125 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-18 09:39:28,125 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-18 09:39:28,125 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-18 09:39:28,125 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-02-18 09:39:28,125 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-18 09:39:28,126 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-18 09:39:28,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-18 09:39:28,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-18 09:39:28,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-18 09:39:28,186 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-18 09:39:28,187 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-18 09:39:28,189 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-02-18 09:39:28,189 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-02-18 09:39:28,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-18 09:39:28,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-18 09:39:28,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:28,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-18 09:39:28,246 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-18 09:39:28,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:28,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-18 09:39:28,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-18 09:39:28,306 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-18 09:39:28,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/1) ... [2019-02-18 09:39:28,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-18 09:39:28,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-18 09:39:28,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-18 09:39:28,348 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-18 09:39:28,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (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 09:39:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-18 09:39:28,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-18 09:39:28,939 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-18 09:39:28,940 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-02-18 09:39:28,941 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:28 BoogieIcfgContainer [2019-02-18 09:39:28,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-18 09:39:28,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-18 09:39:28,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-18 09:39:28,945 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-18 09:39:28,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:28" (1/2) ... [2019-02-18 09:39:28,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b667819 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:39:28, skipping insertion in model container [2019-02-18 09:39:28,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:28" (2/2) ... [2019-02-18 09:39:28,949 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-02-18 09:39:28,958 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-18 09:39:28,966 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-02-18 09:39:28,983 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-02-18 09:39:29,013 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-18 09:39:29,014 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-18 09:39:29,014 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-18 09:39:29,014 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-18 09:39:29,014 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-18 09:39:29,014 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-18 09:39:29,015 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-18 09:39:29,015 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-18 09:39:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-02-18 09:39:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-18 09:39:29,037 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:29,038 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-18 09:39:29,040 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-02-18 09:39:29,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:29,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:29,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,087 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:29,263 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 09:39:29,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:39:29,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:39:29,267 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:29,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:39:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:39:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:39:29,293 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-02-18 09:39:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:29,549 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-02-18 09:39:29,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:39:29,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-18 09:39:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:29,564 INFO L225 Difference]: With dead ends: 41 [2019-02-18 09:39:29,565 INFO L226 Difference]: Without dead ends: 36 [2019-02-18 09:39:29,568 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 09:39:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-02-18 09:39:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-02-18 09:39:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-02-18 09:39:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-02-18 09:39:29,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-02-18 09:39:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:29,619 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-02-18 09:39:29,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:39:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-02-18 09:39:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:29,620 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:29,620 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:29,621 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-02-18 09:39:29,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:29,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:29,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,623 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:29,772 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 09:39:29,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:29,773 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:29,775 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:29,777 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-02-18 09:39:29,809 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:29,809 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:29,898 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:29,901 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:29,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:29,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:29,915 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 09:39:29,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:29,939 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:29,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:30,257 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-02-18 09:39:30,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:39:30,303 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 33 treesize of output 39 [2019-02-18 09:39:30,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,349 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 35 treesize of output 49 [2019-02-18 09:39:30,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,396 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 37 treesize of output 63 [2019-02-18 09:39:30,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,514 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-02-18 09:39:30,516 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 39 treesize of output 81 [2019-02-18 09:39:30,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,664 INFO L303 Elim1Store]: Index analysis took 135 ms [2019-02-18 09:39:30,666 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 41 treesize of output 103 [2019-02-18 09:39:30,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,694 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 43 treesize of output 129 [2019-02-18 09:39:30,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,757 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:39:30,894 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-02-18 09:39:30,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:39:30,899 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,248 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,620 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,699 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,747 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,786 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,831 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,858 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,897 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:32,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,051 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 117 treesize of output 114 [2019-02-18 09:39:32,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:39:32,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,307 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 83 treesize of output 103 [2019-02-18 09:39:32,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,516 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-02-18 09:39:32,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:39:32,653 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 09:39:32,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:39:32,809 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 09:39:32,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:32,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:39:33,114 WARN L181 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:39:33,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,178 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:33,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:39:33,184 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,279 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,338 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,398 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,482 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,604 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,675 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:33,808 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 09:39:33,808 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-18 09:39:33,997 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-02-18 09:39:34,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:34,037 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 09:39:34,038 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:34,398 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 09:39:34,398 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 09:39:34,429 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 09:39:34,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:34,448 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 09:39:34,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:34,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:34,469 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:34,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:34,473 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-02-18 09:39:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:46,437 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-02-18 09:39:46,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:39:46,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:39:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:46,441 INFO L225 Difference]: With dead ends: 71 [2019-02-18 09:39:46,441 INFO L226 Difference]: Without dead ends: 69 [2019-02-18 09:39:46,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:39:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-02-18 09:39:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-02-18 09:39:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-02-18 09:39:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-02-18 09:39:46,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-02-18 09:39:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:46,449 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-02-18 09:39:46,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:39:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-02-18 09:39:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:46,450 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:46,450 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:46,451 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-02-18 09:39:46,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:46,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:46,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:46,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:46,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:46,570 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 09:39:46,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:46,571 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:46,571 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:46,571 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-02-18 09:39:46,572 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:46,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:46,581 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:46,582 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:46,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:46,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:46,583 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 09:39:46,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:46,591 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:46,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:46,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,645 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 117 treesize of output 114 [2019-02-18 09:39:46,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:39:46,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,779 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 83 treesize of output 103 [2019-02-18 09:39:46,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:39:46,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,985 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:46,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:39:47,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:39:47,246 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:39:47,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:47,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:39:47,268 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,329 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,393 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,455 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,521 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,614 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,681 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:47,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:39:47,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-02-18 09:39:47,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-02-18 09:39:47,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-02-18 09:39:47,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-02-18 09:39:47,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 09:39:47,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-02-18 09:39:47,886 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:39:48,084 INFO L303 Elim1Store]: Index analysis took 194 ms [2019-02-18 09:39:48,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:39:48,087 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,286 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,410 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,472 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,522 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,562 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,598 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,629 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,650 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:48,773 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 09:39:48,774 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-18 09:39:48,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:48,865 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 09:39:48,866 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:49,143 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 09:39:49,143 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 09:39:49,178 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 09:39:49,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:49,210 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 09:39:49,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:49,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:49,232 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:49,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:49,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:49,233 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-02-18 09:40:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:00,360 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-02-18 09:40:00,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 09:40:00,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:40:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:00,363 INFO L225 Difference]: With dead ends: 54 [2019-02-18 09:40:00,363 INFO L226 Difference]: Without dead ends: 52 [2019-02-18 09:40:00,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:40:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-02-18 09:40:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-02-18 09:40:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-02-18 09:40:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-02-18 09:40:00,374 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-02-18 09:40:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:00,374 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-02-18 09:40:00,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:40:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-02-18 09:40:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:40:00,374 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:00,374 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:40:00,375 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:00,375 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-02-18 09:40:00,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:00,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:00,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:00,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:00,519 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:00,519 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:40:00,519 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-02-18 09:40:00,520 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:00,520 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:00,530 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:00,531 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:40:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:00,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:00,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:00,531 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 09:40:00,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:00,542 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:00,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:00,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:40:00,625 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 33 treesize of output 39 [2019-02-18 09:40:00,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,634 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 35 treesize of output 49 [2019-02-18 09:40:00,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,685 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 37 treesize of output 63 [2019-02-18 09:40:00,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,703 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 39 treesize of output 81 [2019-02-18 09:40:00,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,837 INFO L303 Elim1Store]: Index analysis took 130 ms [2019-02-18 09:40:00,838 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 41 treesize of output 103 [2019-02-18 09:40:00,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:00,990 INFO L303 Elim1Store]: Index analysis took 146 ms [2019-02-18 09:40:00,992 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 43 treesize of output 129 [2019-02-18 09:40:01,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,045 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:40:01,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:40:01,105 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,209 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,278 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,326 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,366 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,395 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,422 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,445 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:01,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,521 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 117 treesize of output 114 [2019-02-18 09:40:01,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:01,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,637 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 83 treesize of output 103 [2019-02-18 09:40:01,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:01,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:01,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:01,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:02,116 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:02,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:02,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:40:02,138 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,197 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,259 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,322 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,409 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,473 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,535 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:02,637 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 09:40:02,637 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-18 09:40:04,444 WARN L181 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 88 [2019-02-18 09:40:04,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-02-18 09:40:04,608 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-02-18 09:40:04,766 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-02-18 09:40:09,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-02-18 09:40:09,276 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1159 [2019-02-18 09:40:15,394 WARN L181 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 627 DAG size of output: 141 [2019-02-18 09:40:15,396 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 09:40:15,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:15,402 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 09:40:15,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 09:40:15,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 09:40:15,421 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:40:15,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 09:40:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 09:40:15,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:40:15,421 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-02-18 09:40:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:15,533 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-02-18 09:40:15,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:40:15,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-18 09:40:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:15,536 INFO L225 Difference]: With dead ends: 31 [2019-02-18 09:40:15,536 INFO L226 Difference]: Without dead ends: 30 [2019-02-18 09:40:15,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:40:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-18 09:40:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-02-18 09:40:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 09:40:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-02-18 09:40:15,545 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-02-18 09:40:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:15,545 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-02-18 09:40:15,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 09:40:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-02-18 09:40:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:40:15,546 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:15,546 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:40:15,546 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-02-18 09:40:15,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:15,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:15,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:15,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:15,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:15,623 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 09:40:15,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:40:15,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:40:15,624 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:40:15,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:40:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:40:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:40:15,624 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-02-18 09:40:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:15,694 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-02-18 09:40:15,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:40:15,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-18 09:40:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:15,695 INFO L225 Difference]: With dead ends: 37 [2019-02-18 09:40:15,695 INFO L226 Difference]: Without dead ends: 36 [2019-02-18 09:40:15,695 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 09:40:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-02-18 09:40:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-02-18 09:40:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 09:40:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-02-18 09:40:15,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-02-18 09:40:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:15,701 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-02-18 09:40:15,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:40:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-02-18 09:40:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:40:15,702 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:15,702 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:40:15,702 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-02-18 09:40:15,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:15,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:15,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:15,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:15,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:15,848 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 09:40:15,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:15,848 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:15,849 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:40:15,849 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-02-18 09:40:15,850 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:15,850 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:15,856 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:15,857 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:40:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:15,857 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:15,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:15,857 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 09:40:15,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:15,867 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:15,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:15,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:40:15,971 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 33 treesize of output 39 [2019-02-18 09:40:16,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,022 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 35 treesize of output 49 [2019-02-18 09:40:16,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,029 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 37 treesize of output 63 [2019-02-18 09:40:16,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,043 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 39 treesize of output 81 [2019-02-18 09:40:16,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,055 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 41 treesize of output 103 [2019-02-18 09:40:16,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,072 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 43 treesize of output 129 [2019-02-18 09:40:16,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,092 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:40:16,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:40:16,155 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,347 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,412 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,519 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,555 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,587 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,615 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,640 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,670 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,725 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 117 treesize of output 114 [2019-02-18 09:40:16,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:16,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,857 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 83 treesize of output 103 [2019-02-18 09:40:16,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:17,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:17,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:17,273 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:17,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:40:17,295 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,353 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,423 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,494 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,569 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,632 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,695 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,800 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 09:40:17,801 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-18 09:40:17,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:17,839 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 09:40:17,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,954 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 09:40:17,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:17,990 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 09:40:17,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:18,002 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 09:40:18,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:18,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:40:18,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:18,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:40:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:40:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:40:18,022 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-02-18 09:40:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:28,075 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-02-18 09:40:28,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:40:28,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:40:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:28,077 INFO L225 Difference]: With dead ends: 71 [2019-02-18 09:40:28,078 INFO L226 Difference]: Without dead ends: 70 [2019-02-18 09:40:28,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:40:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-02-18 09:40:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-02-18 09:40:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-02-18 09:40:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-02-18 09:40:28,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-02-18 09:40:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:28,086 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-02-18 09:40:28,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:40:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-02-18 09:40:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:40:28,087 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:28,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:40:28,088 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-02-18 09:40:28,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:28,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:28,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:28,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:28,089 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:28,175 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 09:40:28,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:28,176 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:28,176 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:40:28,176 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-02-18 09:40:28,177 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:28,177 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:28,183 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:28,183 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:40:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:28,184 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:28,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:28,184 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:28,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:28,193 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:28,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:28,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,245 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 117 treesize of output 114 [2019-02-18 09:40:28,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:28,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,383 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 83 treesize of output 103 [2019-02-18 09:40:28,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:28,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:28,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:28,849 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:28,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:28,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:40:28,870 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:28,929 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:28,989 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,052 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,115 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,178 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,244 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:40:29,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-02-18 09:40:29,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-02-18 09:40:29,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-02-18 09:40:29,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-02-18 09:40:29,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 09:40:29,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-02-18 09:40:29,357 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:40:29,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:40:29,377 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,458 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,524 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,642 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,677 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,708 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,733 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,755 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,776 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:29,883 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 09:40:29,884 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-18 09:40:29,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:29,985 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 09:40:29,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:30,090 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 09:40:30,090 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:30,109 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 09:40:30,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:30,121 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 09:40:30,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:30,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:40:30,140 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:30,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:40:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:40:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:40:30,140 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-02-18 09:40:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:41,282 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-02-18 09:40:41,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:40:41,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:40:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:41,284 INFO L225 Difference]: With dead ends: 72 [2019-02-18 09:40:41,284 INFO L226 Difference]: Without dead ends: 70 [2019-02-18 09:40:41,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:40:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-02-18 09:40:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-02-18 09:40:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-02-18 09:40:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-02-18 09:40:41,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-02-18 09:40:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:41,292 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-02-18 09:40:41,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:40:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-02-18 09:40:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:41,293 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:41,293 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:41,293 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-02-18 09:40:41,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:41,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:41,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:41,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:41,295 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:41,714 WARN L181 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-02-18 09:40:41,867 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2019-02-18 09:40:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:41,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:41,872 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:41,872 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:41,873 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-02-18 09:40:41,874 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:41,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:41,880 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:41,880 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:41,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:41,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:41,881 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:41,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:41,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:41,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:41,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,952 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 117 treesize of output 114 [2019-02-18 09:40:42,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:42,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,091 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 83 treesize of output 103 [2019-02-18 09:40:42,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:42,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:42,409 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 09:40:42,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:42,578 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:42,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:40:42,609 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,696 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,786 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,881 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,984 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,081 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,178 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:40:43,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-02-18 09:40:43,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-02-18 09:40:43,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-02-18 09:40:43,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-02-18 09:40:43,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 09:40:43,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-02-18 09:40:43,345 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:40:43,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:40:43,363 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,456 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,524 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,569 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,606 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,635 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,659 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,677 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,697 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:43,803 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 09:40:43,804 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-02-18 09:40:43,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,981 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 09:40:43,982 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:44,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:44,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,416 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:44,417 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 53 treesize of output 168 [2019-02-18 09:40:44,418 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,521 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 09:40:44,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 09:40:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:44,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:44,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:44,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:44,593 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:44,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:44,594 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-02-18 09:40:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:48,251 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-02-18 09:40:48,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:48,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:48,253 INFO L225 Difference]: With dead ends: 89 [2019-02-18 09:40:48,253 INFO L226 Difference]: Without dead ends: 87 [2019-02-18 09:40:48,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:40:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-02-18 09:40:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-02-18 09:40:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-02-18 09:40:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-02-18 09:40:48,262 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-02-18 09:40:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:48,262 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-02-18 09:40:48,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-02-18 09:40:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:48,263 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:48,263 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:48,264 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-02-18 09:40:48,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:48,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:48,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:48,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:48,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:48,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:48,409 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:48,409 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:48,409 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-02-18 09:40:48,410 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:48,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:48,416 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:48,416 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:48,417 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:48,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:48,417 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:48,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:48,425 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:48,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:48,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-18 09:40:48,470 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 33 treesize of output 39 [2019-02-18 09:40:48,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,476 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 35 treesize of output 49 [2019-02-18 09:40:48,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,501 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 37 treesize of output 63 [2019-02-18 09:40:48,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,515 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 39 treesize of output 81 [2019-02-18 09:40:48,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,579 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 41 treesize of output 103 [2019-02-18 09:40:48,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,609 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 43 treesize of output 129 [2019-02-18 09:40:48,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:48,624 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-02-18 09:40:48,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-02-18 09:40:48,641 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,721 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,786 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,836 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,876 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,909 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,935 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,959 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:48,980 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:49,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,031 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 117 treesize of output 114 [2019-02-18 09:40:49,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:49,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,150 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 83 treesize of output 103 [2019-02-18 09:40:49,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,218 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:49,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:49,421 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 09:40:49,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:49,590 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:49,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 41 treesize of output 113 [2019-02-18 09:40:49,611 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:49,679 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:49,975 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:50,031 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:50,087 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:50,145 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:50,204 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:50,303 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 09:40:50,304 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-02-18 09:40:50,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 162 [2019-02-18 09:40:50,362 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 09:40:50,715 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 13 dim-0 vars, and 2 xjuncts. [2019-02-18 09:40:50,716 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-02-18 09:40:50,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:50,811 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:50,813 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 137 treesize of output 211 [2019-02-18 09:40:50,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:51,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:51,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 32 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 204 [2019-02-18 09:40:51,176 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 09:40:51,244 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-02-18 09:40:53,920 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 2 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-02-18 09:40:53,921 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-02-18 09:42:54,779 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:42:54,781 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 199719 column 7: Overflow encountered when expanding vector at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-02-18 09:42:54,785 INFO L168 Benchmark]: Toolchain (without parser) took 206541.02 ms. Allocated memory was 136.8 MB in the beginning and 537.4 MB in the end (delta: 400.6 MB). Free memory was 103.2 MB in the beginning and 473.1 MB in the end (delta: -369.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2019-02-18 09:42:54,786 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory is still 104.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-18 09:42:54,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.77 ms. Allocated memory is still 136.8 MB. Free memory was 103.0 MB in the beginning and 100.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-02-18 09:42:54,786 INFO L168 Benchmark]: Boogie Preprocessor took 41.28 ms. Allocated memory is still 136.8 MB. Free memory was 100.7 MB in the beginning and 99.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-18 09:42:54,787 INFO L168 Benchmark]: RCFGBuilder took 593.40 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 85.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-02-18 09:42:54,787 INFO L168 Benchmark]: TraceAbstraction took 205842.67 ms. Allocated memory was 136.8 MB in the beginning and 537.4 MB in the end (delta: 400.6 MB). Free memory was 85.4 MB in the beginning and 473.1 MB in the end (delta: -387.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-02-18 09:42:54,789 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory is still 104.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.77 ms. Allocated memory is still 136.8 MB. Free memory was 103.0 MB in the beginning and 100.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.28 ms. Allocated memory is still 136.8 MB. Free memory was 100.7 MB in the beginning and 99.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 593.40 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 85.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205842.67 ms. Allocated memory was 136.8 MB in the beginning and 537.4 MB in the end (delta: 400.6 MB). Free memory was 85.4 MB in the beginning and 473.1 MB in the end (delta: -387.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 199719 column 7: Overflow encountered when expanding vector de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 199719 column 7: Overflow encountered when expanding vector: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...