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/eureka_01.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-299a4a8 [2018-12-04 11:42:48,034 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-04 11:42:48,037 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-04 11:42:48,050 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-04 11:42:48,050 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-04 11:42:48,052 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-04 11:42:48,053 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-04 11:42:48,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-04 11:42:48,057 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-04 11:42:48,058 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-04 11:42:48,059 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-04 11:42:48,083 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 11:42:48,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-04 11:42:48,098 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-04 11:42:48,099 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-04 11:42:48,099 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-04 11:42:48,099 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-04 11:42:48,099 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-04 11:42:48,100 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-04 11:42:48,100 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-04 11:42:48,100 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-04 11:42:48,100 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-04 11:42:48,101 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-04 11:42:48,101 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-04 11:42:48,101 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-04 11:42:48,101 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-04 11:42:48,101 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-04 11:42:48,102 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-04 11:42:48,102 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-04 11:42:48,103 INFO L133 SettingsManager]: * Use SBE=true [2018-12-04 11:42:48,103 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-04 11:42:48,103 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-04 11:42:48,103 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-04 11:42:48,104 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-04 11:42:48,104 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-04 11:42:48,104 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-04 11:42:48,104 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-04 11:42:48,104 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-04 11:42:48,105 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-04 11:42:48,105 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-04 11:42:48,105 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-04 11:42:48,105 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-04 11:42:48,105 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-04 11:42:48,106 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-04 11:42:48,106 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-04 11:42:48,106 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-04 11:42:48,106 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-04 11:42:48,106 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-04 11:42:48,107 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-04 11:42:48,107 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-04 11:42:48,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-04 11:42:48,107 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-04 11:42:48,107 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-04 11:42:48,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-04 11:42:48,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-04 11:42:48,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-04 11:42:48,187 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-04 11:42:48,188 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-04 11:42:48,189 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/eureka_01.i_3.bpl [2018-12-04 11:42:48,189 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/eureka_01.i_3.bpl' [2018-12-04 11:42:48,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-04 11:42:48,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-04 11:42:48,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-04 11:42:48,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-04 11:42:48,268 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-04 11:42:48,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-04 11:42:48,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-04 11:42:48,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-04 11:42:48,315 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-04 11:42:48,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/1) ... [2018-12-04 11:42:48,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-04 11:42:48,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-04 11:42:48,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-04 11:42:48,347 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-04 11:42:48,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (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 11:42:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-04 11:42:48,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-04 11:42:48,728 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-04 11:42:48,729 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-04 11:42:48,729 INFO L202 PluginConnector]: Adding new model eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 11:42:48 BoogieIcfgContainer [2018-12-04 11:42:48,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-04 11:42:48,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-04 11:42:48,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-04 11:42:48,734 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-04 11:42:48,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.12 11:42:48" (1/2) ... [2018-12-04 11:42:48,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1170f and model type eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 11:42:48, skipping insertion in model container [2018-12-04 11:42:48,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 11:42:48" (2/2) ... [2018-12-04 11:42:48,738 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01.i_3.bpl [2018-12-04 11:42:48,750 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-04 11:42:48,761 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-04 11:42:48,780 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-04 11:42:48,825 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-04 11:42:48,825 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-04 11:42:48,825 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-04 11:42:48,826 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-04 11:42:48,826 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-04 11:42:48,826 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-04 11:42:48,826 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-04 11:42:48,827 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-04 11:42:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-04 11:42:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-04 11:42:48,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:48,852 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-04 11:42:48,855 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:48,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 928714, now seen corresponding path program 1 times [2018-12-04 11:42:48,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:48,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:48,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:48,927 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:49,142 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 11:42:49,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-04 11:42:49,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-04 11:42:49,145 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-04 11:42:49,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-04 11:42:49,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-04 11:42:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-04 11:42:49,194 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-12-04 11:42:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:49,324 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-12-04 11:42:49,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-04 11:42:49,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-12-04 11:42:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:49,338 INFO L225 Difference]: With dead ends: 11 [2018-12-04 11:42:49,338 INFO L226 Difference]: Without dead ends: 7 [2018-12-04 11:42:49,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-04 11:42:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-04 11:42:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-12-04 11:42:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-04 11:42:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-12-04 11:42:49,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 4 [2018-12-04 11:42:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:49,380 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-12-04 11:42:49,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-04 11:42:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-12-04 11:42:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-04 11:42:49,380 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:49,381 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-04 11:42:49,381 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:49,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 28791948, now seen corresponding path program 1 times [2018-12-04 11:42:49,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:49,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:49,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:49,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:49,383 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-04 11:42:49,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-04 11:42:49,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-04 11:42:49,539 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-04 11:42:49,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-04 11:42:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-04 11:42:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-04 11:42:49,542 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-12-04 11:42:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:49,604 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2018-12-04 11:42:49,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-04 11:42:49,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-04 11:42:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:49,606 INFO L225 Difference]: With dead ends: 11 [2018-12-04 11:42:49,606 INFO L226 Difference]: Without dead ends: 7 [2018-12-04 11:42:49,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-04 11:42:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-04 11:42:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-04 11:42:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-04 11:42:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-12-04 11:42:49,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-12-04 11:42:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-12-04 11:42:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-04 11:42:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-12-04 11:42:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-04 11:42:49,612 INFO L394 BasicCegarLoop]: Found error trace [2018-12-04 11:42:49,612 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-04 11:42:49,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-04 11:42:49,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 894131125, now seen corresponding path program 1 times [2018-12-04 11:42:49,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-04 11:42:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:49,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-04 11:42:49,615 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-04 11:42:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-04 11:42:49,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:49,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-04 11:42:49,725 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-04 11:42:49,727 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [12], [14], [16] [2018-12-04 11:42:49,781 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-04 11:42:49,781 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-04 11:42:49,936 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-04 11:42:49,937 INFO L272 AbstractInterpreter]: Visited 6 different actions 14 times. Merged at 2 different actions 4 times. Never widened. Performed 370 root evaluator evaluations with a maximum evaluation depth of 4. Performed 370 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-04 11:42:49,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-04 11:42:49,953 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-04 11:42:49,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-04 11:42:49,954 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 11:42:49,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-04 11:42:49,967 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-04 11:42:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-04 11:42:49,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-04 11:42:50,038 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-04 11:42:50,040 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-04 11:42:50,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-04 11:42:50,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-04 11:42:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-04 11:42:50,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-04 11:42:50,262 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-12-04 11:42:50,263 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-04 11:42:50,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-04 11:42:50,272 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:3 [2018-12-04 11:42:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-04 11:42:50,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-04 11:42:50,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2018-12-04 11:42:50,293 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-04 11:42:50,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-04 11:42:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-04 11:42:50,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-04 11:42:50,296 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-12-04 11:42:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-04 11:42:50,380 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2018-12-04 11:42:50,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-04 11:42:50,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-12-04 11:42:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-04 11:42:50,382 INFO L225 Difference]: With dead ends: 7 [2018-12-04 11:42:50,382 INFO L226 Difference]: Without dead ends: 0 [2018-12-04 11:42:50,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-04 11:42:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-04 11:42:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-04 11:42:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-04 11:42:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-04 11:42:50,384 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-12-04 11:42:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-04 11:42:50,385 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-04 11:42:50,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-04 11:42:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-04 11:42:50,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-04 11:42:50,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-04 11:42:50,617 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 3 153) no Hoare annotation was computed. [2018-12-04 11:42:50,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 152) no Hoare annotation was computed. [2018-12-04 11:42:50,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 3 153) no Hoare annotation was computed. [2018-12-04 11:42:50,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 3 153) no Hoare annotation was computed. [2018-12-04 11:42:50,618 INFO L444 ceAbstractionStarter]: At program point L122(lines 105 122) the Hoare annotation is: (or (= 0 (select ULTIMATE.start_main_~distance~5 0)) (= ULTIMATE.start_main_~i~5 0)) [2018-12-04 11:42:50,619 INFO L444 ceAbstractionStarter]: At program point L150(lines 114 150) the Hoare annotation is: (or (= 0 (select ULTIMATE.start_main_~distance~5 0)) (and (= ULTIMATE.start_main_~i~5 0) (<= ULTIMATE.start_main_~nodecount~5 0))) [2018-12-04 11:42:50,619 INFO L444 ceAbstractionStarter]: At program point L141(lines 141 151) the Hoare annotation is: false [2018-12-04 11:42:50,630 INFO L202 PluginConnector]: Adding new model eureka_01.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.12 11:42:50 BoogieIcfgContainer [2018-12-04 11:42:50,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-04 11:42:50,631 INFO L168 Benchmark]: Toolchain (without parser) took 2365.33 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 703.6 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -723.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-04 11:42:50,634 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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 11:42:50,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.93 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 11:42:50,635 INFO L168 Benchmark]: Boogie Preprocessor took 31.85 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 11:42:50,636 INFO L168 Benchmark]: RCFGBuilder took 382.73 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 11:42:50,637 INFO L168 Benchmark]: TraceAbstraction took 1900.03 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 703.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -744.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-04 11:42:50,641 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 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 45.93 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 31.85 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 382.73 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 1900.03 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 703.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -744.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 152]: 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: 105]: Loop Invariant Derived loop invariant: 0 == main_~distance~5[0] || main_~i~5 == 0 - InvariantResult [Line: 114]: Loop Invariant Derived loop invariant: 0 == main_~distance~5[0] || (main_~i~5 == 0 && main_~nodecount~5 <= 0) - InvariantResult [Line: 141]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 8 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 20 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 7 NumberOfFragments, 23 HoareAnnotationTreeSize, 3 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 348 SizeOfPredicates, 5 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 4/7 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...