java -ea -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_array_oct.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-WithArrays.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e4dfe74 [2018-12-18 18:09:12,924 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-18 18:09:12,926 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-18 18:09:12,939 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-18 18:09:12,940 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-18 18:09:12,941 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-18 18:09:12,942 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-18 18:09:12,945 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-18 18:09:12,946 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-18 18:09:12,947 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-18 18:09:12,948 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-18 18:09:12,975 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-18 18:09:12,988 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-18 18:09:12,989 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-18 18:09:12,990 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-18 18:09:12,990 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-18 18:09:12,990 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-18 18:09:12,991 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-18 18:09:12,991 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-18 18:09:12,991 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-18 18:09:12,991 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-18 18:09:12,992 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-18 18:09:12,992 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-18 18:09:12,992 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-18 18:09:12,993 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-18 18:09:12,993 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-18 18:09:12,993 INFO L133 SettingsManager]: * Use SBE=true [2018-12-18 18:09:12,994 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-18 18:09:12,994 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-18 18:09:12,994 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-18 18:09:12,995 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-18 18:09:12,997 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-18 18:09:12,997 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-18 18:09:12,997 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-18 18:09:12,997 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-18 18:09:12,998 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-18 18:09:12,998 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-18 18:09:12,998 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-18 18:09:12,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-18 18:09:12,999 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-18 18:09:12,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-18 18:09:12,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-18 18:09:12,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-18 18:09:13,000 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-18 18:09:13,001 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-18 18:09:13,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-18 18:09:13,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-18 18:09:13,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-18 18:09:13,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-18 18:09:13,061 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-18 18:09:13,063 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-WithArrays.bpl [2018-12-18 18:09:13,063 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-WithArrays.bpl' [2018-12-18 18:09:13,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-18 18:09:13,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-18 18:09:13,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-18 18:09:13,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-18 18:09:13,111 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-18 18:09:13,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,149 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-18 18:09:13,150 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-18 18:09:13,150 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-18 18:09:13,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-18 18:09:13,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-18 18:09:13,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-18 18:09:13,156 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-18 18:09:13,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/1) ... [2018-12-18 18:09:13,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-18 18:09:13,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-18 18:09:13,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-18 18:09:13,189 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-18 18:09:13,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (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 [2018-12-18 18:09:13,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-12-18 18:09:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-18 18:09:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-18 18:09:13,561 INFO L272 CfgBuilder]: Using library mode [2018-12-18 18:09:13,562 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-18 18:09:13,562 INFO L202 PluginConnector]: Adding new model Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:09:13 BoogieIcfgContainer [2018-12-18 18:09:13,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-18 18:09:13,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-18 18:09:13,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-18 18:09:13,568 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-18 18:09:13,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.12 06:09:13" (1/2) ... [2018-12-18 18:09:13,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690e272d and model type Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:09:13, skipping insertion in model container [2018-12-18 18:09:13,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-WithArrays.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:09:13" (2/2) ... [2018-12-18 18:09:13,572 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-WithArrays.bpl [2018-12-18 18:09:13,583 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-18 18:09:13,593 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-18 18:09:13,613 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-18 18:09:13,652 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-18 18:09:13,652 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-18 18:09:13,652 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-18 18:09:13,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-18 18:09:13,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-18 18:09:13,653 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-18 18:09:13,653 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-18 18:09:13,653 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-18 18:09:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-18 18:09:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-18 18:09:13,678 INFO L394 BasicCegarLoop]: Found error trace [2018-12-18 18:09:13,679 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-18 18:09:13,682 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-18 18:09:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-18 18:09:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-12-18 18:09:13,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-18 18:09:13,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-18 18:09:13,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-18 18:09:13,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-18 18:09:13,754 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-18 18:09:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-18 18:09:14,159 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-12-18 18:09:14,193 INFO L273 TraceCheckUtils]: 0: Hoare triple {9#true} assume x > y;a := a[x := 0];a := a[y := 1000]; {11#(and (= (select main_a main_x) 0) (not (= main_x main_y)))} is VALID [2018-12-18 18:09:14,201 INFO L273 TraceCheckUtils]: 1: Hoare triple {11#(and (= (select main_a main_x) 0) (not (= main_x main_y)))} assume a[x] == 1000; {10#false} is VALID [2018-12-18 18:09:14,201 INFO L273 TraceCheckUtils]: 2: Hoare triple {10#false} assume !(a[y] <= 0); {10#false} is VALID [2018-12-18 18:09:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-18 18:09:14,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-18 18:09:14,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-18 18:09:14,205 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-18 18:09:14,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-18 18:09:14,212 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-18 18:09:14,216 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-18 18:09:14,251 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-18 18:09:14,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-18 18:09:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-18 18:09:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-18 18:09:14,263 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-18 18:09:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-18 18:09:14,440 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-12-18 18:09:14,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-18 18:09:14,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-18 18:09:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-18 18:09:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-18 18:09:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 14 transitions. [2018-12-18 18:09:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-18 18:09:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 14 transitions. [2018-12-18 18:09:14,456 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 14 transitions. [2018-12-18 18:09:14,491 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-18 18:09:14,506 INFO L225 Difference]: With dead ends: 13 [2018-12-18 18:09:14,506 INFO L226 Difference]: Without dead ends: 5 [2018-12-18 18:09:14,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-18 18:09:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-18 18:09:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-18 18:09:14,607 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-18 18:09:14,608 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2018-12-18 18:09:14,609 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-18 18:09:14,609 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-18 18:09:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-18 18:09:14,611 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-18 18:09:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-18 18:09:14,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-18 18:09:14,613 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-18 18:09:14,613 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-18 18:09:14,613 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-18 18:09:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-18 18:09:14,616 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-18 18:09:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-18 18:09:14,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-18 18:09:14,617 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-18 18:09:14,617 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-18 18:09:14,618 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-18 18:09:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-18 18:09:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-18 18:09:14,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-18 18:09:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-18 18:09:14,624 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-18 18:09:14,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-18 18:09:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-18 18:09:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-18 18:09:14,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-18 18:09:14,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-18 18:09:14,626 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-18 18:09:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-18 18:09:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-12-18 18:09:14,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-18 18:09:14,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-18 18:09:14,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-18 18:09:14,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-18 18:09:14,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-18 18:09:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-18 18:09:15,108 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-12-18 18:09:15,222 INFO L273 TraceCheckUtils]: 0: Hoare triple {46#true} assume x > y;a := a[x := 0];a := a[y := 1000]; {48#(and (= (select main_a main_x) 0) (not (= main_x main_y)))} is VALID [2018-12-18 18:09:15,224 INFO L273 TraceCheckUtils]: 1: Hoare triple {48#(and (= (select main_a main_x) 0) (not (= main_x main_y)))} a := a[x := a[x] + 1];a := a[y := a[y] - 1]; {49#(and (not (= (select main_a main_x) 1000)) (not (= main_x main_y)))} is VALID [2018-12-18 18:09:15,225 INFO L273 TraceCheckUtils]: 2: Hoare triple {49#(and (not (= (select main_a main_x) 1000)) (not (= main_x main_y)))} assume a[x] == 1000; {47#false} is VALID [2018-12-18 18:09:15,226 INFO L273 TraceCheckUtils]: 3: Hoare triple {47#false} assume !(a[y] <= 0); {47#false} is VALID [2018-12-18 18:09:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-18 18:09:15,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-18 18:09:15,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-18 18:09:15,230 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-18 18:09:15,232 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [9] [2018-12-18 18:09:15,298 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-18 18:09:15,299 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-18 18:09:16,270 FATAL L214 ngHoareTripleChecker]: Soundness check failed for the following hoare triple [2018-12-18 18:09:16,270 FATAL L217 ngHoareTripleChecker]: Expected: VALID Actual: INVALID [2018-12-18 18:09:16,271 FATAL L219 ngHoareTripleChecker]: Solver was "Z3" in version "4.8.3" [2018-12-18 18:09:16,273 FATAL L223 ngHoareTripleChecker]: -- [2018-12-18 18:09:16,273 FATAL L224 ngHoareTripleChecker]: Pre: {2147483643#(exists ((v_v_2_1 Int) (v_b_2_1 Int) (v_b_3_1 Int) (v_v_5_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- v_b_3_1 c_main_y) 1) (<= (- (- v_b_0_1) (- v_b_3_1)) 0) (<= (- v_b_0_1 c_main_x) 0) (<= (- v_v_2_1 (- v_v_5_1)) 1000) (<= (- v_v_5_1 (- v_v_5_1)) 2000) (<= (- (- v_b_2_1) (- c_main_y)) 0) (<= (- (- v_v_2_1) (- v_v_5_1)) 1000) (<= (- (- v_b_0_1) (- v_b_2_1)) (- 1)) (<= (- v_b_2_1 c_main_x) (- 1)) (<= (- v_b_3_1 c_main_x) 0) (<= (- v_v_2_1 (- v_v_2_1)) 0) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- (- v_b_2_1) (- v_b_3_1)) 1) (<= (- (- v_b_1_1) (- c_main_y)) (- 2)) (<= (- v_b_1_1 c_main_x) 1) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_2_1 v_b_3_1) (- 1)) (<= (- v_b_2_1 c_main_y) 0) (<= (- (- v_b_1_1) (- v_b_2_1)) (- 2)) (<= (- (- v_v_2_1) v_v_5_1) (- 1000)) (forall ((v_idx_20 Int) (v_idx_18 Int) (v_idx_19 Int) (v_idx_16 Int) (v_idx_17 Int)) (or (< v_idx_18 v_b_3_1) (<= v_b_2_1 v_idx_16) (< v_idx_17 v_b_2_1) (<= v_b_1_1 v_idx_19) (and (<= (- (- (select c_main_a v_idx_19)) (- (select c_main_a v_idx_17))) 1000) (<= (- (select c_main_a v_idx_19) (- (select c_main_a v_idx_17))) 1000) (<= (- (select c_main_a v_idx_19) (select c_main_a v_idx_17)) (- 1000)) (<= (- (select c_main_a v_idx_19) (- (select c_main_a v_idx_19))) 0) (<= (- (select c_main_a v_idx_17) (- (select c_main_a v_idx_17))) 2000) (<= (- (- (select c_main_a v_idx_19)) (select c_main_a v_idx_17)) (- 1000)) (<= (- (- (select c_main_a v_idx_19)) (select c_main_a v_idx_19)) 0) (<= (- (- (select c_main_a v_idx_17)) (select c_main_a v_idx_17)) (- 2000))) (< v_idx_19 v_b_0_1) (< v_idx_20 v_b_1_1) (<= v_b_0_1 v_idx_18) (<= v_b_3_1 v_idx_17))) (<= (- (- v_b_0_1) (- c_main_x)) 0) (<= (- (- v_b_3_1) (- c_main_y)) (- 1)) (<= (- (- v_b_0_1) (- c_main_y)) (- 1)) (<= (- (- v_b_1_1) (- v_b_3_1)) (- 1)) (<= (- v_v_2_1 v_v_5_1) (- 1000)) (<= (- (- v_b_1_1) (- c_main_x)) (- 1)) (<= (- (- c_main_x) (- c_main_y)) (- 1)) (<= (- (- v_v_2_1) v_v_2_1) 0) (<= (- (- v_v_5_1) v_v_5_1) (- 2000))))} [2018-12-18 18:09:16,274 FATAL L228 ngHoareTripleChecker]: Action: assume a[x] == 1000; [2018-12-18 18:09:16,275 FATAL L184 hOps$ForEachOp$OfRef]: ActionStr: (= (select c_main_a c_main_x) 1000) [2018-12-18 18:09:16,275 FATAL L230 ngHoareTripleChecker]: Post: {2147483642#false} [2018-12-18 18:09:16,277 FATAL L263 ngHoareTripleChecker]: unsat core / model generation is disabled, enable it to get more details [2018-12-18 18:09:16,278 FATAL L268 ngHoareTripleChecker]: -- [2018-12-18 18:09:16,278 FATAL L269 ngHoareTripleChecker]: Simplified triple [2018-12-18 18:09:17,355 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-12-18 18:09:17,653 FATAL L270 ngHoareTripleChecker]: Pre: {2147483643#(or (and (exists ((v_b_2_1 Int) (v_b_3_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- v_b_3_1 main_y) 1) (<= (- (- v_b_0_1) (- v_b_3_1)) 0) (<= (- v_b_0_1 main_x) 0) (< v_b_1_1 (+ v_b_0_1 1)) (<= (- (- v_b_2_1) (- main_y)) 0) (<= (- (- v_b_0_1) (- v_b_2_1)) (- 1)) (<= (- v_b_2_1 main_x) (- 1)) (< v_b_3_1 (+ v_b_2_1 1)) (forall ((v_prenex_8 Int) (v_prenex_9 Int)) (or (<= v_b_1_1 v_prenex_8) (< v_prenex_9 v_b_2_1) (< v_prenex_8 v_b_0_1) (<= v_b_3_1 v_prenex_9) (<= (- (- (select main_a v_prenex_8)) (select main_a v_prenex_9)) (- 1000)))) (<= (- v_b_3_1 main_x) 0) (<= (- (- v_b_2_1) (- v_b_3_1)) 1) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- (- v_b_1_1) (- main_y)) (- 2)) (<= (- v_b_1_1 main_x) 1) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_2_1 v_b_3_1) (- 1)) (<= (- v_b_2_1 main_y) 0) (<= (- (- v_b_1_1) (- v_b_2_1)) (- 2)) (<= (- (- v_b_0_1) (- main_x)) 0) (forall ((v_idx_19 Int) (v_idx_17 Int)) (or (<= (- (select main_a v_idx_19) (- (select main_a v_idx_17))) 1000) (<= v_b_1_1 v_idx_19) (< v_idx_17 v_b_2_1) (< v_idx_19 v_b_0_1) (<= v_b_3_1 v_idx_17))) (<= (- (- v_b_3_1) (- main_y)) (- 1)) (<= (- (- v_b_0_1) (- main_y)) (- 1)) (<= (- (- v_b_1_1) (- v_b_3_1)) (- 1)) (forall ((v_prenex_4 Int) (v_prenex_5 Int)) (or (<= v_b_3_1 v_prenex_5) (<= (- (- (select main_a v_prenex_4)) (- (select main_a v_prenex_5))) 1000) (< v_prenex_5 v_b_2_1) (<= v_b_1_1 v_prenex_4) (< v_prenex_4 v_b_0_1))) (forall ((v_prenex_6 Int) (v_prenex_7 Int)) (or (<= (- (select main_a v_prenex_6) (select main_a v_prenex_7)) (- 1000)) (<= v_b_3_1 v_prenex_7) (< v_prenex_7 v_b_2_1) (<= v_b_1_1 v_prenex_6) (< v_prenex_6 v_b_0_1))) (<= (- (- v_b_1_1) (- main_x)) (- 1)))) (<= (- (- main_x) (- main_y)) (- 1))) (and (exists ((v_b_2_1 Int) (v_b_3_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- v_b_3_1 main_y) 1) (<= (- (- v_b_0_1) (- v_b_3_1)) 0) (<= (- v_b_0_1 main_x) 0) (forall ((v_prenex_3 Int)) (or (<= (- (select main_a v_prenex_3) (- (select main_a v_prenex_3))) 2000) (<= v_b_3_1 v_prenex_3) (< v_prenex_3 v_b_2_1))) (<= (- (- v_b_2_1) (- main_y)) 0) (<= (- (- v_b_0_1) (- v_b_2_1)) (- 1)) (<= (- v_b_2_1 main_x) (- 1)) (< v_b_3_1 (+ v_b_2_1 1)) (forall ((v_prenex_8 Int) (v_prenex_9 Int)) (or (<= v_b_1_1 v_prenex_8) (< v_prenex_9 v_b_2_1) (< v_prenex_8 v_b_0_1) (<= v_b_3_1 v_prenex_9) (<= (- (- (select main_a v_prenex_8)) (select main_a v_prenex_9)) (- 1000)))) (<= (- v_b_3_1 main_x) 0) (<= (- (- v_b_2_1) (- v_b_3_1)) 1) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- (- v_b_1_1) (- main_y)) (- 2)) (<= (- v_b_1_1 main_x) 1) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_2_1 v_b_3_1) (- 1)) (<= (- v_b_2_1 main_y) 0) (<= (- (- v_b_1_1) (- v_b_2_1)) (- 2)) (forall ((v_prenex_2 Int)) (or (<= v_b_3_1 v_prenex_2) (<= (- (- (select main_a v_prenex_2)) (select main_a v_prenex_2)) (- 2000)) (< v_prenex_2 v_b_2_1))) (<= (- (- v_b_0_1) (- main_x)) 0) (forall ((v_idx_19 Int) (v_idx_17 Int)) (or (<= (- (select main_a v_idx_19) (- (select main_a v_idx_17))) 1000) (<= v_b_1_1 v_idx_19) (< v_idx_17 v_b_2_1) (< v_idx_19 v_b_0_1) (<= v_b_3_1 v_idx_17))) (<= (- (- v_b_3_1) (- main_y)) (- 1)) (<= (- (- v_b_0_1) (- main_y)) (- 1)) (<= (- (- v_b_1_1) (- v_b_3_1)) (- 1)) (forall ((v_prenex_4 Int) (v_prenex_5 Int)) (or (<= v_b_3_1 v_prenex_5) (<= (- (- (select main_a v_prenex_4)) (- (select main_a v_prenex_5))) 1000) (< v_prenex_5 v_b_2_1) (<= v_b_1_1 v_prenex_4) (< v_prenex_4 v_b_0_1))) (forall ((v_prenex_6 Int) (v_prenex_7 Int)) (or (<= (- (select main_a v_prenex_6) (select main_a v_prenex_7)) (- 1000)) (<= v_b_3_1 v_prenex_7) (< v_prenex_7 v_b_2_1) (<= v_b_1_1 v_prenex_6) (< v_prenex_6 v_b_0_1))) (<= (- (- v_b_1_1) (- main_x)) (- 1)))) (<= (- (- main_x) (- main_y)) (- 1))) (and (<= main_x (+ main_y 1)) (<= (+ main_y 1) main_x) (<= (- (- main_x) (- main_y)) (- 1))) (and (exists ((v_b_2_1 Int) (v_b_3_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- v_b_3_1 main_y) 1) (<= (- (- v_b_0_1) (- v_b_3_1)) 0) (<= (- v_b_0_1 main_x) 0) (forall ((v_prenex_3 Int)) (or (<= (- (select main_a v_prenex_3) (- (select main_a v_prenex_3))) 2000) (<= v_b_3_1 v_prenex_3) (< v_prenex_3 v_b_2_1))) (forall ((v_prenex_10 Int)) (or (< v_prenex_10 v_b_0_1) (<= v_b_1_1 v_prenex_10) (<= (- (- (select main_a v_prenex_10)) (select main_a v_prenex_10)) 0))) (<= (- (- v_b_2_1) (- main_y)) 0) (<= (- (- v_b_0_1) (- v_b_2_1)) (- 1)) (<= (- v_b_2_1 main_x) (- 1)) (forall ((v_prenex_8 Int) (v_prenex_9 Int)) (or (<= v_b_1_1 v_prenex_8) (< v_prenex_9 v_b_2_1) (< v_prenex_8 v_b_0_1) (<= v_b_3_1 v_prenex_9) (<= (- (- (select main_a v_prenex_8)) (select main_a v_prenex_9)) (- 1000)))) (<= (- v_b_3_1 main_x) 0) (<= (- (- v_b_2_1) (- v_b_3_1)) 1) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- (- v_b_1_1) (- main_y)) (- 2)) (<= (- v_b_1_1 main_x) 1) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_2_1 v_b_3_1) (- 1)) (<= (- v_b_2_1 main_y) 0) (<= (- (- v_b_1_1) (- v_b_2_1)) (- 2)) (forall ((v_prenex_2 Int)) (or (<= v_b_3_1 v_prenex_2) (<= (- (- (select main_a v_prenex_2)) (select main_a v_prenex_2)) (- 2000)) (< v_prenex_2 v_b_2_1))) (<= (- (- v_b_0_1) (- main_x)) 0) (forall ((v_idx_19 Int) (v_idx_17 Int)) (or (<= (- (select main_a v_idx_19) (- (select main_a v_idx_17))) 1000) (<= v_b_1_1 v_idx_19) (< v_idx_17 v_b_2_1) (< v_idx_19 v_b_0_1) (<= v_b_3_1 v_idx_17))) (<= (- (- v_b_3_1) (- main_y)) (- 1)) (<= (- (- v_b_0_1) (- main_y)) (- 1)) (<= (- (- v_b_1_1) (- v_b_3_1)) (- 1)) (forall ((v_prenex_4 Int) (v_prenex_5 Int)) (or (<= v_b_3_1 v_prenex_5) (<= (- (- (select main_a v_prenex_4)) (- (select main_a v_prenex_5))) 1000) (< v_prenex_5 v_b_2_1) (<= v_b_1_1 v_prenex_4) (< v_prenex_4 v_b_0_1))) (forall ((v_prenex_6 Int) (v_prenex_7 Int)) (or (<= (- (select main_a v_prenex_6) (select main_a v_prenex_7)) (- 1000)) (<= v_b_3_1 v_prenex_7) (< v_prenex_7 v_b_2_1) (<= v_b_1_1 v_prenex_6) (< v_prenex_6 v_b_0_1))) (forall ((v_prenex_1 Int)) (or (<= (- (select main_a v_prenex_1) (- (select main_a v_prenex_1))) 0) (< v_prenex_1 v_b_0_1) (<= v_b_1_1 v_prenex_1))) (<= (- (- v_b_1_1) (- main_x)) (- 1)))) (<= (- (- main_x) (- main_y)) (- 1))) (and (exists ((v_b_2_1 Int) (v_b_3_1 Int) (v_b_0_1 Int) (v_b_1_1 Int)) (and (<= (- v_b_3_1 main_y) 1) (<= (- (- v_b_0_1) (- v_b_3_1)) 0) (<= (- v_b_0_1 main_x) 0) (< v_b_1_1 (+ v_b_0_1 1)) (forall ((v_prenex_10 Int)) (or (< v_prenex_10 v_b_0_1) (<= v_b_1_1 v_prenex_10) (<= (- (- (select main_a v_prenex_10)) (select main_a v_prenex_10)) 0))) (<= (- (- v_b_2_1) (- main_y)) 0) (<= (- (- v_b_0_1) (- v_b_2_1)) (- 1)) (<= (- v_b_2_1 main_x) (- 1)) (forall ((v_prenex_8 Int) (v_prenex_9 Int)) (or (<= v_b_1_1 v_prenex_8) (< v_prenex_9 v_b_2_1) (< v_prenex_8 v_b_0_1) (<= v_b_3_1 v_prenex_9) (<= (- (- (select main_a v_prenex_8)) (select main_a v_prenex_9)) (- 1000)))) (<= (- v_b_3_1 main_x) 0) (<= (- (- v_b_2_1) (- v_b_3_1)) 1) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- (- v_b_1_1) (- main_y)) (- 2)) (<= (- v_b_1_1 main_x) 1) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- v_b_2_1 v_b_3_1) (- 1)) (<= (- v_b_2_1 main_y) 0) (<= (- (- v_b_1_1) (- v_b_2_1)) (- 2)) (<= (- (- v_b_0_1) (- main_x)) 0) (forall ((v_idx_19 Int) (v_idx_17 Int)) (or (<= (- (select main_a v_idx_19) (- (select main_a v_idx_17))) 1000) (<= v_b_1_1 v_idx_19) (< v_idx_17 v_b_2_1) (< v_idx_19 v_b_0_1) (<= v_b_3_1 v_idx_17))) (<= (- (- v_b_3_1) (- main_y)) (- 1)) (<= (- (- v_b_0_1) (- main_y)) (- 1)) (<= (- (- v_b_1_1) (- v_b_3_1)) (- 1)) (forall ((v_prenex_4 Int) (v_prenex_5 Int)) (or (<= v_b_3_1 v_prenex_5) (<= (- (- (select main_a v_prenex_4)) (- (select main_a v_prenex_5))) 1000) (< v_prenex_5 v_b_2_1) (<= v_b_1_1 v_prenex_4) (< v_prenex_4 v_b_0_1))) (forall ((v_prenex_6 Int) (v_prenex_7 Int)) (or (<= (- (select main_a v_prenex_6) (select main_a v_prenex_7)) (- 1000)) (<= v_b_3_1 v_prenex_7) (< v_prenex_7 v_b_2_1) (<= v_b_1_1 v_prenex_6) (< v_prenex_6 v_b_0_1))) (forall ((v_prenex_1 Int)) (or (<= (- (select main_a v_prenex_1) (- (select main_a v_prenex_1))) 0) (< v_prenex_1 v_b_0_1) (<= v_b_1_1 v_prenex_1))) (<= (- (- v_b_1_1) (- main_x)) (- 1)))) (<= (- (- main_x) (- main_y)) (- 1))))} [2018-12-18 18:09:17,653 FATAL L274 ngHoareTripleChecker]: Action: assume a[x] == 1000; [2018-12-18 18:09:17,654 FATAL L184 hOps$ForEachOp$OfRef]: ActionStr: (= (select c_main_a c_main_x) 1000) [2018-12-18 18:09:17,680 FATAL L276 ngHoareTripleChecker]: Post: {2147483642#false} [2018-12-18 18:09:17,680 FATAL L272 FixpointEngine]: Post is unsound because the term-transformation of the following triple is not valid: [2018-12-18 18:09:17,682 FATAL L273 FixpointEngine]: PreBL : #1{Arrays: {[main_a] -> [-inf_0] v_4 [b_2] v_5 [b_3] v_6 [b_0] v_2 [b_1] v_3 [inf_0], }, Substate: {ints: {v_5 = [1000; 1000]; v_2 = [0; 0]}, 9 vars top, relations: {main_x - main_y = [1; inf]; b_3 - main_y = [1; 1]; b_2 - main_y = [0; 0]; b_1 - main_y = [2; inf]; b_0 - main_y = [1; inf]; v_2 + v_5 = [1000; 1000]; v_2 - v_5 = [-1000; -1000]; b_3 - main_x = [-inf; 0]; b_2 - main_x = [-inf; -1]; b_1 - main_x = [1; 1]; b_0 - main_x = [0; 0]; b_2 - b_3 = [-1; -1]; b_1 - b_3 = [1; inf]; b_0 - b_3 = [0; inf]; b_1 - b_2 = [2; inf]; b_0 - b_2 = [1; inf]; b_0 - b_1 = [-1; -1]}, }} [2018-12-18 18:09:17,683 FATAL L274 FixpointEngine]: PreH : #1{Arrays: {[main_a] -> [-inf_0] v_0 [inf_0], }, Substate: {3 vars top, }} [2018-12-18 18:09:17,683 FATAL L278 FixpointEngine]: Action: assume a[x] == 1000; (to main) [2018-12-18 18:09:17,683 FATAL L282 FixpointEngine]: Post : #1{Arrays: {[main_a] -> [-inf_0] v_4 [inf_0], }, Substate: false} [2018-12-18 18:09:17,684 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Post is unsound at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:255) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:382) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-18 18:09:17,688 INFO L168 Benchmark]: Toolchain (without parser) took 4579.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 169.2 MB). Peak memory consumption was 169.2 MB. Max. memory is 7.1 GB. [2018-12-18 18:09:17,691 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-18 18:09:17,691 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-18 18:09:17,693 INFO L168 Benchmark]: Boogie Preprocessor took 32.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-18 18:09:17,693 INFO L168 Benchmark]: RCFGBuilder took 374.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-18 18:09:17,694 INFO L168 Benchmark]: TraceAbstraction took 4123.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-12-18 18:09:17,700 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.34 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 43.73 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 32.73 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 374.25 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 4123.25 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Post is unsound de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Post is unsound: de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:255) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...