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/20170304-DifficultPathPrograms/n.c11.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-299a4a8 [2018-12-04 11:42:53,592 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-04 11:42:53,596 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-04 11:42:53,612 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-04 11:42:53,613 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-04 11:42:53,614 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-04 11:42:53,615 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-04 11:42:53,617 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-04 11:42:53,619 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-04 11:42:53,620 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-04 11:42:53,621 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-04 11:42:53,645 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-04 11:42:53,658 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-04 11:42:53,658 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-04 11:42:53,659 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-04 11:42:53,659 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-04 11:42:53,659 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-04 11:42:53,660 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-04 11:42:53,660 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-04 11:42:53,660 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-04 11:42:53,660 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-04 11:42:53,660 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-04 11:42:53,661 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-04 11:42:53,661 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-04 11:42:53,661 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-04 11:42:53,661 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-04 11:42:53,661 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-04 11:42:53,662 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-04 11:42:53,662 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-04 11:42:53,662 INFO L133 SettingsManager]: * Use SBE=true [2018-12-04 11:42:53,663 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-04 11:42:53,663 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-04 11:42:53,663 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-04 11:42:53,663 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-04 11:42:53,663 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-04 11:42:53,664 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-04 11:42:53,664 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-04 11:42:53,664 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-04 11:42:53,664 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-04 11:42:53,664 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-04 11:42:53,665 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-04 11:42:53,665 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-04 11:42:53,665 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-04 11:42:53,665 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-04 11:42:53,665 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-04 11:42:53,666 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-04 11:42:53,666 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-04 11:42:53,666 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-04 11:42:53,666 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-04 11:42:53,666 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-04 11:42:53,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-04 11:42:53,667 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-04 11:42:53,667 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-04 11:42:53,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-04 11:42:53,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-04 11:42:53,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-04 11:42:53,717 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-04 11:42:53,718 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-04 11:42:53,718 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2018-12-04 11:42:53,719 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2018-12-04 11:42:53,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-04 11:42:53,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-04 11:42:53,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-04 11:42:53,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-04 11:42:53,756 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-04 11:42:53,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-04 11:42:53,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-04 11:42:53,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-04 11:42:53,796 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-04 11:42:53,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... [2018-12-04 11:42:53,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-04 11:42:53,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-04 11:42:53,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-04 11:42:53,823 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-04 11:42:53,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-04 11:42:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-04 11:42:53,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-04 11:42:54,057 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-04 11:42:54,057 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-04 11:42:54,058 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 11:42:54 BoogieIcfgContainer [2018-12-04 11:42:54,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-04 11:42:54,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-04 11:42:54,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-04 11:42:54,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-04 11:42:54,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:53" (1/2) ... [2018-12-04 11:42:54,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341b5e46 and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 11:42:54, skipping insertion in model container [2018-12-04 11:42:54,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 11:42:54" (2/2) ... [2018-12-04 11:42:54,066 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2018-12-04 11:42:54,078 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-04 11:42:54,087 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-04 11:42:54,107 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-04 11:42:54,146 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-04 11:42:54,147 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-04 11:42:54,147 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-04 11:42:54,147 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-04 11:42:54,147 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-04 11:42:54,147 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-04 11:42:54,148 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-04 11:42:54,148 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-04 11:42:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-04 11:42:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-04 11:42:54,170 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:54,171 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-04 11:42:54,174 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:54,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:54,181 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-04 11:42:54,184 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:54,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:54,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:54,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:54,236 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:54,540 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-12-04 11:42:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:54,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-04 11:42:54,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-04 11:42:54,546 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-04 11:42:54,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-04 11:42:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-04 11:42:54,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-04 11:42:54,575 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-04 11:42:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:54,642 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-04 11:42:54,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-04 11:42:54,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-04 11:42:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:54,656 INFO L225 Difference]: With dead ends: 9 [2018-12-04 11:42:54,656 INFO L226 Difference]: Without dead ends: 5 [2018-12-04 11:42:54,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-04 11:42:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-04 11:42:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-04 11:42:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-04 11:42:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-04 11:42:54,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-04 11:42:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:54,698 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-04 11:42:54,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-04 11:42:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-04 11:42:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-04 11:42:54,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:54,699 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-04 11:42:54,700 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:54,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-04 11:42:54,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:54,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:54,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:54,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:54,702 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:54,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:54,881 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-04 11:42:54,882 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-04 11:42:54,884 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-04 11:42:54,918 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-04 11:42:54,918 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-04 11:42:55,064 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-04 11:42:55,066 INFO L272 AbstractInterpreter]: Visited 4 different actions 13 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 5. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-04 11:42:55,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:55,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-04 11:42:55,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:55,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-04 11:42:55,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:55,095 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-04 11:42:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:55,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-04 11:42:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:55,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-04 11:42:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:55,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-04 11:42:55,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2018-12-04 11:42:55,307 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-04 11:42:55,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-04 11:42:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-04 11:42:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-04 11:42:55,309 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-12-04 11:42:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:55,348 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-04 11:42:55,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-04 11:42:55,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-04 11:42:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:55,349 INFO L225 Difference]: With dead ends: 8 [2018-12-04 11:42:55,349 INFO L226 Difference]: Without dead ends: 6 [2018-12-04 11:42:55,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-04 11:42:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-04 11:42:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-04 11:42:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-04 11:42:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-04 11:42:55,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-04 11:42:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:55,354 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-04 11:42:55,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-04 11:42:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-04 11:42:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-04 11:42:55,355 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:55,355 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-04 11:42:55,356 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:55,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:55,356 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-12-04 11:42:55,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:55,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:55,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:55,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:55,358 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:55,715 WARN L180 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-12-04 11:42:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:55,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:55,717 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-04 11:42:55,718 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-04 11:42:55,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-04 11:42:55,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:55,719 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-04 11:42:55,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-04 11:42:55,738 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-04 11:42:55,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-04 11:42:55,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-04 11:42:55,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-04 11:42:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:55,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-04 11:42:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:55,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-04 11:42:55,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2018-12-04 11:42:55,921 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-04 11:42:55,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-04 11:42:55,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-04 11:42:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-04 11:42:55,923 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-12-04 11:42:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:55,999 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-04 11:42:55,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-04 11:42:55,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-04 11:42:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:56,000 INFO L225 Difference]: With dead ends: 9 [2018-12-04 11:42:56,000 INFO L226 Difference]: Without dead ends: 7 [2018-12-04 11:42:56,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-04 11:42:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-04 11:42:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-04 11:42:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-04 11:42:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-04 11:42:56,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-04 11:42:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:56,004 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-04 11:42:56,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-04 11:42:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-04 11:42:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-04 11:42:56,005 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:56,006 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-04 11:42:56,006 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:56,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-12-04 11:42:56,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:56,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-04 11:42:56,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:56,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:56,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:56,312 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-04 11:42:56,312 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-04 11:42:56,312 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-04 11:42:56,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:56,313 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-04 11:42:56,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-04 11:42:56,322 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-04 11:42:56,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-04 11:42:56,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-04 11:42:56,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-04 11:42:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:56,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-04 11:42:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:56,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-04 11:42:56,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-04 11:42:56,539 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-04 11:42:56,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-04 11:42:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-04 11:42:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-04 11:42:56,540 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-12-04 11:42:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:56,588 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-04 11:42:56,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-04 11:42:56,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-04 11:42:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:56,589 INFO L225 Difference]: With dead ends: 10 [2018-12-04 11:42:56,589 INFO L226 Difference]: Without dead ends: 8 [2018-12-04 11:42:56,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-04 11:42:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-04 11:42:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-04 11:42:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-04 11:42:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-04 11:42:56,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-04 11:42:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:56,593 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-04 11:42:56,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-04 11:42:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-04 11:42:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-04 11:42:56,594 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:56,594 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-12-04 11:42:56,594 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:56,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-12-04 11:42:56,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:56,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:56,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-04 11:42:56,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:56,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:57,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:57,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-04 11:42:57,058 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-04 11:42:57,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-04 11:42:57,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:57,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-04 11:42:57,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:57,068 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-04 11:42:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:57,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-04 11:42:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:57,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-04 11:42:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:57,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-04 11:42:57,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-12-04 11:42:57,262 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-04 11:42:57,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-04 11:42:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-04 11:42:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-04 11:42:57,263 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-12-04 11:42:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:57,325 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-04 11:42:57,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-04 11:42:57,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-04 11:42:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:57,327 INFO L225 Difference]: With dead ends: 9 [2018-12-04 11:42:57,327 INFO L226 Difference]: Without dead ends: 0 [2018-12-04 11:42:57,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-04 11:42:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-04 11:42:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-04 11:42:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-04 11:42:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-04 11:42:57,329 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2018-12-04 11:42:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:57,330 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-04 11:42:57,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-04 11:42:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-04 11:42:57,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-04 11:42:57,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-04 11:42:57,439 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-12-04 11:42:57,439 INFO L444 ceAbstractionStarter]: At program point L31(lines 31 41) the Hoare annotation is: false [2018-12-04 11:42:57,439 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2018-12-04 11:42:57,439 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-12-04 11:42:57,440 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 42) no Hoare annotation was computed. [2018-12-04 11:42:57,440 INFO L444 ceAbstractionStarter]: At program point L40(lines 17 40) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5)) (and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1)) (and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5)) (and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5)) (and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))) [2018-12-04 11:42:57,452 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.12 11:42:57 BoogieIcfgContainer [2018-12-04 11:42:57,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-04 11:42:57,453 INFO L168 Benchmark]: Toolchain (without parser) took 3699.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 182.4 MB). Peak memory consumption was 182.4 MB. Max. memory is 7.1 GB. [2018-12-04 11:42:57,454 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-04 11:42:57,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-04 11:42:57,456 INFO L168 Benchmark]: Boogie Preprocessor took 26.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-04 11:42:57,457 INFO L168 Benchmark]: RCFGBuilder took 235.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-04 11:42:57,458 INFO L168 Benchmark]: TraceAbstraction took 3393.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 161.3 MB). Peak memory consumption was 161.3 MB. Max. memory is 7.1 GB. [2018-12-04 11:42:57,462 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 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 235.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3393.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 161.3 MB). Peak memory consumption was 161.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((main_~len~5 <= 0 && 0 <= main_~len~5) || (1 <= main_~len~5 && main_~len~5 <= 1)) || (main_~len~5 <= 2 && 2 <= main_~len~5)) || (main_~len~5 <= 3 && 3 <= main_~len~5)) || (4 <= main_~len~5 && main_~len~5 <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 72 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 37 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1534 SizeOfPredicates, 12 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/60 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...