java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-df3cc4e-m [2019-01-11 11:13:55,675 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 11:13:55,677 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 11:13:55,688 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 11:13:55,689 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 11:13:55,690 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 11:13:55,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 11:13:55,693 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 11:13:55,695 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 11:13:55,696 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 11:13:55,697 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 11:13:55,721 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-11 11:13:55,733 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 11:13:55,734 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 11:13:55,734 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 11:13:55,735 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 11:13:55,735 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 11:13:55,735 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 11:13:55,735 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 11:13:55,735 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 11:13:55,736 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 11:13:55,737 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 11:13:55,737 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 11:13:55,738 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 11:13:55,738 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 11:13:55,738 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 11:13:55,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 11:13:55,738 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 11:13:55,739 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 11:13:55,739 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 11:13:55,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 11:13:55,739 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 11:13:55,739 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 11:13:55,740 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 11:13:55,740 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 11:13:55,740 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 11:13:55,740 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 11:13:55,740 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 11:13:55,741 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:13:55,741 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 11:13:55,741 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 11:13:55,741 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 11:13:55,741 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 11:13:55,742 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 11:13:55,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 11:13:55,742 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 11:13:55,742 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 11:13:55,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 11:13:55,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 11:13:55,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 11:13:55,802 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 11:13:55,803 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 11:13:55,804 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl [2019-01-11 11:13:55,804 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl' [2019-01-11 11:13:55,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 11:13:55,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 11:13:55,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 11:13:55,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 11:13:55,844 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 11:13:55,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 11:13:55,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 11:13:55,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 11:13:55,901 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 11:13:55,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... [2019-01-11 11:13:55,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 11:13:55,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 11:13:55,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 11:13:55,934 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 11:13:55,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:13:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 11:13:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 11:13:56,459 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 11:13:56,460 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-11 11:13:56,461 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:13:56 BoogieIcfgContainer [2019-01-11 11:13:56,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 11:13:56,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 11:13:56,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 11:13:56,479 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 11:13:56,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:13:55" (1/2) ... [2019-01-11 11:13:56,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559bf78 and model type speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 11:13:56, skipping insertion in model container [2019-01-11 11:13:56,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:13:56" (2/2) ... [2019-01-11 11:13:56,483 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-limited.bpl [2019-01-11 11:13:56,494 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 11:13:56,504 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-11 11:13:56,521 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-11 11:13:56,560 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 11:13:56,561 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 11:13:56,561 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 11:13:56,561 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 11:13:56,561 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 11:13:56,561 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 11:13:56,562 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 11:13:56,562 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 11:13:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-11 11:13:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 11:13:56,591 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:13:56,592 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 11:13:56,595 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:13:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-11 11:13:56,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:13:56,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:56,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:56,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:56,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:13:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:56,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:13:56,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:13:56,795 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:13:56,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:13:56,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:13:56,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:56,814 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-11 11:13:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:13:57,039 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-11 11:13:57,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:13:57,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 11:13:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:13:57,055 INFO L225 Difference]: With dead ends: 37 [2019-01-11 11:13:57,055 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 11:13:57,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:13:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 11:13:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-11 11:13:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-11 11:13:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-11 11:13:57,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-11 11:13:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:13:57,099 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-11 11:13:57,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:13:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-11 11:13:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:13:57,100 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:13:57,100 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:13:57,101 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:13:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-11 11:13:57,102 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:13:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:57,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:13:57,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:13:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:57,470 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-01-11 11:13:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:13:57,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:13:57,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:13:57,504 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:13:57,506 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-11 11:13:57,542 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:13:57,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:13:57,616 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:13:57,618 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:13:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:13:57,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:13:57,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:13:57,624 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:13:57,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:13:57,635 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:13:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:13:57,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:13:58,143 WARN L181 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-11 11:13:58,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 11:13:58,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 11:13:58,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 11:13:58,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 11:13:58,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 11:13:58,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 11:13:58,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,424 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-11 11:13:58,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 11:13:58,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:58,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 11:13:58,470 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 11:13:58,828 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,064 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,138 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,180 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,218 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,251 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,278 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-01-11 11:13:59,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2019-01-11 11:13:59,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:13:59,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 62 [2019-01-11 11:13:59,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-11 11:13:59,730 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-01-11 11:13:59,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-11 11:13:59,752 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,755 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,757 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,759 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,762 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,764 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:13:59,821 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. [2019-01-11 11:13:59,821 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-01-11 11:13:59,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:13:59,919 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 [2019-01-11 11:13:59,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:00,320 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. [2019-01-11 11:14:00,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-01-11 11:14:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:02,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:02,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:02,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:02,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:02,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-01-11 11:14:02,862 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-11 11:14:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:45,610 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-11 11:14:45,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:14:45,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:45,612 INFO L225 Difference]: With dead ends: 63 [2019-01-11 11:14:45,612 INFO L226 Difference]: Without dead ends: 60 [2019-01-11 11:14:45,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=31, Invalid=40, Unknown=1, NotChecked=0, Total=72 [2019-01-11 11:14:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-11 11:14:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-11 11:14:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-11 11:14:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-11 11:14:45,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-11 11:14:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:45,621 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-11 11:14:45,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-11 11:14:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:45,622 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:45,622 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:45,622 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-11 11:14:45,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:45,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:45,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:45,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:45,625 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:45,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:45,741 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:45,741 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:45,741 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-11 11:14:45,742 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:45,743 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:45,755 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:45,755 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:45,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:45,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:45,756 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:14:45,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:45,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:45,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:45,894 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-11 11:14:45,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 11:14:45,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 11:14:45,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 11:14:45,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 11:14:45,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:45,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 11:14:46,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 11:14:46,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 11:14:46,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 11:14:46,122 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,290 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,341 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,382 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,429 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,475 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,635 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:46,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-01-11 11:14:46,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2019-01-11 11:14:46,896 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-01-11 11:14:46,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:46,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:14:47,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 62 [2019-01-11 11:14:47,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-11 11:14:47,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-11 11:14:47,218 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,221 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,239 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,243 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,245 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,251 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,289 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. [2019-01-11 11:14:47,289 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-01-11 11:14:47,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:47,374 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 [2019-01-11 11:14:47,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:47,492 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. [2019-01-11 11:14:47,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-01-11 11:14:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:49,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:14:50,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:50,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:50,012 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:50,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:50,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:50,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-01-11 11:14:50,013 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-11 11:15:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:15:30,415 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-11 11:15:30,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:15:30,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:15:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:15:30,417 INFO L225 Difference]: With dead ends: 62 [2019-01-11 11:15:30,417 INFO L226 Difference]: Without dead ends: 60 [2019-01-11 11:15:30,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=31, Invalid=40, Unknown=1, NotChecked=0, Total=72 [2019-01-11 11:15:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-11 11:15:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-11 11:15:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-11 11:15:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-11 11:15:30,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-11 11:15:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:15:30,425 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-11 11:15:30,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:15:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-11 11:15:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:15:30,425 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:15:30,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:15:30,426 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:15:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-11 11:15:30,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:15:30,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:30,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:30,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:30,427 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:15:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:30,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:15:30,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:15:30,501 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:15:30,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:15:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:15:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:15:30,501 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-11 11:15:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:15:30,557 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-11 11:15:30,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:15:30,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 11:15:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:15:30,558 INFO L225 Difference]: With dead ends: 31 [2019-01-11 11:15:30,558 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 11:15:30,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:15:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 11:15:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-11 11:15:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-11 11:15:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-11 11:15:30,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-11 11:15:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:15:30,565 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-11 11:15:30,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:15:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-11 11:15:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:15:30,566 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:15:30,566 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:15:30,566 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:15:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-11 11:15:30,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:15:30,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:30,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:30,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:30,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:15:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:30,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:30,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:15:30,628 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:15:30,628 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-11 11:15:30,630 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:15:30,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:15:30,643 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:15:30,644 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:15:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:30,644 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:15:30,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:30,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:15:30,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:30,652 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:15:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:30,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:15:31,054 WARN L181 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-01-11 11:15:31,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 41 [2019-01-11 11:15:31,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2019-01-11 11:15:31,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2019-01-11 11:15:31,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 56 [2019-01-11 11:15:31,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 74 [2019-01-11 11:15:31,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-11 11:15:31,207 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,210 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,212 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,213 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,215 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,218 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 11:15:31,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 11:15:31,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 11:15:31,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 11:15:31,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 11:15:31,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 11:15:31,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 11:15:31,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 11:15:31,316 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,398 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,440 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,478 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,506 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,527 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,544 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,561 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,596 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. [2019-01-11 11:15:31,597 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:80, output treesize:62 [2019-01-11 11:15:31,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:31,704 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 [2019-01-11 11:15:31,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:31,826 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. [2019-01-11 11:15:31,826 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-01-11 11:15:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:31,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:15:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:31,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:15:31,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 11:15:31,863 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:15:31,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:15:31,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:15:31,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 11:15:31,865 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-11 11:15:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:15:32,003 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-11 11:15:32,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:15:32,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 11:15:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:15:32,004 INFO L225 Difference]: With dead ends: 32 [2019-01-11 11:15:32,005 INFO L226 Difference]: Without dead ends: 31 [2019-01-11 11:15:32,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 11:15:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-11 11:15:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-11 11:15:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 11:15:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-11 11:15:32,012 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-11 11:15:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:15:32,013 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-11 11:15:32,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:15:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-11 11:15:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:15:32,013 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:15:32,013 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:15:32,014 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:15:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-11 11:15:32,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:15:32,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:32,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:32,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:15:32,015 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:15:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:32,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:32,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:15:32,088 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:15:32,089 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-11 11:15:32,090 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:15:32,090 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:15:32,106 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:15:32,106 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:15:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:15:32,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:15:32,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:15:32,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:15:32,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:15:32,115 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:15:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:15:32,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:15:32,246 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-11 11:15:32,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 11:15:32,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 11:15:32,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 11:15:32,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 11:15:32,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 11:15:32,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 11:15:32,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 11:15:32,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 11:15:32,333 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,459 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,526 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,568 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,604 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,635 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,660 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,681 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:32,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2019-01-11 11:15:32,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2019-01-11 11:15:32,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 11:15:32,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 62 [2019-01-11 11:15:32,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:32,943 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-11 11:15:32,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-11 11:15:33,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-11 11:15:33,033 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,035 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,037 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,038 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,045 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,047 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,081 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. [2019-01-11 11:15:33,082 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:94, output treesize:62 [2019-01-11 11:15:33,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:15:33,191 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 [2019-01-11 11:15:33,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:15:33,334 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. [2019-01-11 11:15:33,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-01-11 11:15:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:35,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:15:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:15:35,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:15:35,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:15:35,856 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:15:35,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:15:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:15:35,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-01-11 11:15:35,857 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-11 11:16:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:11,174 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-11 11:16:11,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:16:11,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:16:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:11,176 INFO L225 Difference]: With dead ends: 65 [2019-01-11 11:16:11,176 INFO L226 Difference]: Without dead ends: 64 [2019-01-11 11:16:11,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=31, Invalid=40, Unknown=1, NotChecked=0, Total=72 [2019-01-11 11:16:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-11 11:16:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-11 11:16:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 11:16:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-11 11:16:11,184 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-11 11:16:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:11,185 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-11 11:16:11,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:16:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-11 11:16:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:16:11,185 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:11,186 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:16:11,186 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-11 11:16:11,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:11,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:11,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:11,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:11,188 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:11,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:11,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:11,324 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:16:11,324 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-11 11:16:11,325 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:11,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:11,332 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:11,332 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 98 root evaluator evaluations with a maximum evaluation depth of 3. Performed 98 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:16:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:11,333 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:11,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:11,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:16:11,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:11,346 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:11,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:11,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 11:16:11,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 11:16:11,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 11:16:11,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 11:16:11,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 11:16:11,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 11:16:11,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 11:16:11,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 11:16:11,505 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,584 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,627 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,662 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,689 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,709 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,727 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,744 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-11 11:16:11,782 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:11,815 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. [2019-01-11 11:16:11,816 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:57, output treesize:62 [2019-01-11 11:16:11,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:11,879 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 [2019-01-11 11:16:11,880 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:12,067 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. [2019-01-11 11:16:12,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:72, output treesize:62 [2019-01-11 11:16:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:14,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:16:14,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:14,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:16:14,547 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:14,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:16:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:16:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-01-11 11:16:14,548 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-11 11:16:20,854 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-11 11:16:20,857 INFO L168 Benchmark]: Toolchain (without parser) took 145014.61 ms. Allocated memory was 132.1 MB in the beginning and 373.8 MB in the end (delta: 241.7 MB). Free memory was 104.8 MB in the beginning and 348.4 MB in the end (delta: -243.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:16:20,858 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:16:20,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.08 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 102.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:16:20,859 INFO L168 Benchmark]: Boogie Preprocessor took 32.87 ms. Allocated memory is still 132.1 MB. Free memory was 102.4 MB in the beginning and 101.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:16:20,862 INFO L168 Benchmark]: RCFGBuilder took 527.73 ms. Allocated memory is still 132.1 MB. Free memory was 101.1 MB in the beginning and 88.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2019-01-11 11:16:20,864 INFO L168 Benchmark]: TraceAbstraction took 144393.89 ms. Allocated memory was 132.1 MB in the beginning and 373.8 MB in the end (delta: 241.7 MB). Free memory was 87.9 MB in the beginning and 348.4 MB in the end (delta: -260.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:16:20,866 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 0.21 ms. Allocated memory is still 132.1 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.08 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 102.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.87 ms. Allocated memory is still 132.1 MB. Free memory was 102.4 MB in the beginning and 101.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 527.73 ms. Allocated memory is still 132.1 MB. Free memory was 101.1 MB in the beginning and 88.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 144393.89 ms. Allocated memory was 132.1 MB in the beginning and 373.8 MB in the end (delta: 241.7 MB). Free memory was 87.9 MB in the beginning and 348.4 MB in the end (delta: -260.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...