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_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-20 10:37:52,616 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:37:52,618 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:37:52,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-20 10:37:52,668 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 [2019-01-20 10:37:52,681 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:37:52,682 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:37:52,682 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:37:52,683 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:37:52,683 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:37:52,683 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:37:52,683 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:37:52,683 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:37:52,684 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:37:52,684 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-20 10:37:52,684 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-20 10:37:52,684 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:37:52,684 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:37:52,685 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:37:52,685 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:37:52,685 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:37:52,686 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:37:52,686 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:37:52,686 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:37:52,686 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:37:52,686 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:37:52,687 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:37:52,688 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:37:52,688 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:37:52,688 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:37:52,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:37:52,688 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:37:52,689 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:37:52,689 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:37:52,689 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:37:52,689 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:37:52,689 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:37:52,690 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:37:52,690 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:37:52,725 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:37:52,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:37:52,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:37:52,746 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:37:52,747 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:37:52,748 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl [2019-01-20 10:37:52,748 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl' [2019-01-20 10:37:52,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:37:52,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:37:52,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:37:52,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:37:52,781 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:37:52,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:37:52,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:37:52,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:37:52,834 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:37:52,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/1) ... [2019-01-20 10:37:52,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:37:52,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:37:52,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:37:52,856 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:37:52,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (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 [2019-01-20 10:37:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:37:52,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:37:53,178 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:37:53,178 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-20 10:37:53,180 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:37:53 BoogieIcfgContainer [2019-01-20 10:37:53,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:37:53,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:37:53,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:37:53,186 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:37:53,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:37:52" (1/2) ... [2019-01-20 10:37:53,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223a510a and model type speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:37:53, skipping insertion in model container [2019-01-20 10:37:53,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:37:53" (2/2) ... [2019-01-20 10:37:53,191 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-unlimited.bpl [2019-01-20 10:37:53,201 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:37:53,211 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-20 10:37:53,228 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-20 10:37:53,271 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:37:53,272 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:37:53,272 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:37:53,272 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:37:53,272 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:37:53,272 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:37:53,273 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:37:53,273 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:37:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-20 10:37:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:37:53,301 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:37:53,302 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:37:53,305 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:37:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-20 10:37:53,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:37:53,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:53,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:53,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:53,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:37:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:37:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:53,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:37:53,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:37:53,479 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:37:53,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:37:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:37:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:37:53,495 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-20 10:37:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:37:53,719 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-20 10:37:53,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:37:53,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:37:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:37:53,767 INFO L225 Difference]: With dead ends: 13 [2019-01-20 10:37:53,770 INFO L226 Difference]: Without dead ends: 8 [2019-01-20 10:37:53,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:37:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-20 10:37:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-20 10:37:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-20 10:37:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-20 10:37:53,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-20 10:37:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:37:53,819 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-20 10:37:53,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:37:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-20 10:37:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:37:53,820 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:37:53,821 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:37:53,821 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:37:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-20 10:37:53,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:37:53,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:53,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:53,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:53,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:37:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:37:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:53,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:37:53,913 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:37:53,914 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:37:53,916 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-20 10:37:53,975 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:37:53,975 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:37:54,941 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:37:54,943 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:37:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:54,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:37:54,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:37:54,952 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:37:54,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:54,968 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:37:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:37:55,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:37:55,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-20 10:37:55,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-01-20 10:37:55,187 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:37:55,216 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:37:55,263 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-20 10:37:55,264 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-20 10:37:55,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:37:55,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-20 10:37:55,317 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:37:55,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:37:55,322 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-20 10:37:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:55,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:37:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:55,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:37:55,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-20 10:37:55,420 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:37:55,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:37:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:37:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-20 10:37:55,422 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-20 10:37:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:37:55,586 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-20 10:37:55,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:37:55,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-20 10:37:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:37:55,588 INFO L225 Difference]: With dead ends: 10 [2019-01-20 10:37:55,589 INFO L226 Difference]: Without dead ends: 9 [2019-01-20 10:37:55,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-20 10:37:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-20 10:37:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-20 10:37:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-20 10:37:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-20 10:37:55,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-20 10:37:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:37:55,595 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-20 10:37:55,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:37:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-20 10:37:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:37:55,597 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:37:55,597 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:37:55,597 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:37:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-20 10:37:55,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:37:55,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:55,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:55,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:55,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:37:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:37:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:55,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:37:55,697 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:37:55,697 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:37:55,697 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-20 10:37:55,698 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:37:55,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:37:59,129 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:37:59,130 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:37:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:59,133 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:37:59,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:37:59,133 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:37:59,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:59,152 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:37:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:37:59,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:37:59,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-20 10:37:59,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-20 10:37:59,275 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:37:59,368 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:37:59,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-20 10:37:59,499 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:37:59,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:37:59,525 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-20 10:37:59,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:37:59,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-20 10:37:59,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:37:59,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-20 10:37:59,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-01-20 10:37:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:59,662 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:37:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:37:59,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:37:59,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:37:59,708 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:37:59,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:37:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:37:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:37:59,709 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-20 10:37:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:37:59,924 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-20 10:37:59,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:37:59,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:37:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:37:59,925 INFO L225 Difference]: With dead ends: 17 [2019-01-20 10:37:59,926 INFO L226 Difference]: Without dead ends: 14 [2019-01-20 10:37:59,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:37:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-20 10:37:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-20 10:37:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-20 10:37:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-20 10:37:59,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-20 10:37:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:37:59,931 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-20 10:37:59,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:37:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-20 10:37:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:37:59,931 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:37:59,931 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:37:59,931 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:37:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:37:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-20 10:37:59,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:37:59,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:59,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:37:59,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:37:59,933 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:37:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:00,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:00,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:38:00,014 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:38:00,014 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-20 10:38:00,017 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:38:00,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:38:00,423 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:38:00,424 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:38:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:00,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:38:00,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:00,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:38:00,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:00,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:38:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:00,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:38:00,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-20 10:38:00,554 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-20 10:38:00,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-20 10:38:00,566 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,576 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,589 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-20 10:38:00,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:00,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2019-01-20 10:38:00,610 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,675 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-20 10:38:00,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:00,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:00,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:00,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:00,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2019-01-20 10:38:00,721 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:00,732 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-20 10:38:00,732 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-01-20 10:38:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:00,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:38:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:01,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:38:01,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:38:01,200 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:38:01,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:38:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:38:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:38:01,202 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-20 10:38:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:38:01,342 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-20 10:38:01,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:38:01,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:38:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:38:01,344 INFO L225 Difference]: With dead ends: 18 [2019-01-20 10:38:01,344 INFO L226 Difference]: Without dead ends: 15 [2019-01-20 10:38:01,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:38:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-20 10:38:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-20 10:38:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-20 10:38:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-20 10:38:01,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-20 10:38:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:38:01,349 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-20 10:38:01,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:38:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-20 10:38:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:38:01,350 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:38:01,350 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:38:01,351 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:38:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-20 10:38:01,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:38:01,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:01,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:01,353 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:38:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:01,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:01,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:38:01,393 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:38:01,393 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-20 10:38:01,395 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:38:01,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:38:03,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:38:03,784 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:38:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:03,784 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:38:03,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:03,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:38:03,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:03,797 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:38:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:03,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:38:03,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-20 10:38:03,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-01-20 10:38:03,864 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:03,912 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:03,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-20 10:38:03,990 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-20 10:38:04,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:04,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-20 10:38:04,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:04,104 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:04,105 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-20 10:38:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:04,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:38:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:04,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:38:04,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:38:04,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:38:04,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:38:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:38:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:38:04,160 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-20 10:38:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:38:04,191 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-20 10:38:04,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:38:04,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-20 10:38:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:38:04,192 INFO L225 Difference]: With dead ends: 12 [2019-01-20 10:38:04,192 INFO L226 Difference]: Without dead ends: 10 [2019-01-20 10:38:04,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:38:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-20 10:38:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-20 10:38:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-20 10:38:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-20 10:38:04,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-20 10:38:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:38:04,197 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-20 10:38:04,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:38:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-20 10:38:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:38:04,197 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:38:04,197 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-20 10:38:04,198 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:38:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-20 10:38:04,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:38:04,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:04,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:04,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:04,199 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:38:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-20 10:38:04,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:38:04,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-20 10:38:04,255 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:38:04,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:38:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:38:04,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-20 10:38:04,256 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-20 10:38:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:38:04,312 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-20 10:38:04,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:38:04,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-20 10:38:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:38:04,313 INFO L225 Difference]: With dead ends: 11 [2019-01-20 10:38:04,313 INFO L226 Difference]: Without dead ends: 9 [2019-01-20 10:38:04,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-20 10:38:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-20 10:38:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-20 10:38:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-20 10:38:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-20 10:38:04,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-20 10:38:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:38:04,318 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-20 10:38:04,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:38:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-20 10:38:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:38:04,319 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:38:04,319 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:38:04,319 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:38:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-20 10:38:04,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:38:04,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:04,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:04,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:38:04,321 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:38:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:04,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:04,405 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:38:04,405 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:38:04,406 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-20 10:38:04,408 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:38:04,408 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:38:04,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:38:04,782 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:38:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:38:04,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:38:04,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:38:04,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:38:04,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:38:04,809 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:38:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:38:04,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:38:04,937 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-01-20 10:38:04,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-20 10:38:04,954 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:04,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-20 10:38:04,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-20 10:38:04,989 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:04,997 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:05,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:05,004 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-20 10:38:05,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:05,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-20 10:38:05,028 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:05,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:38:05,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-20 10:38:05,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:05,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:05,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:05,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:38:05,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2019-01-20 10:38:05,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:38:05,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-20 10:38:05,100 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2019-01-20 10:38:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:05,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:38:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:38:05,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:38:05,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:38:05,173 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:38:05,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:38:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:38:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:38:05,174 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 8 states. [2019-01-20 10:38:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:38:05,262 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-20 10:38:05,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:38:05,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-20 10:38:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:38:05,264 INFO L225 Difference]: With dead ends: 12 [2019-01-20 10:38:05,264 INFO L226 Difference]: Without dead ends: 0 [2019-01-20 10:38:05,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:38:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-20 10:38:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-20 10:38:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-20 10:38:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-20 10:38:05,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-20 10:38:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:38:05,266 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-20 10:38:05,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:38:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-20 10:38:05,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-20 10:38:05,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-20 10:38:05,666 WARN L181 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-01-20 10:38:05,669 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-20 10:38:05,669 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-01-20 10:38:05,669 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-20 10:38:05,669 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 32) no Hoare annotation was computed. [2019-01-20 10:38:05,670 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 23 29) the Hoare annotation is: (let ((.cse2 (select |#memory_int| ULTIMATE.start_main_p1))) (let ((.cse0 (let ((.cse3 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))) (or (and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 .cse3)) (and (= .cse2 0) (= 0 .cse3))))) (.cse1 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ .cse2 1)) ULTIMATE.start_main_p2))) (or (and .cse0 (= 0 .cse1)) (and .cse0 (<= (+ .cse1 1) 0))))) [2019-01-20 10:38:05,670 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 34) no Hoare annotation was computed. [2019-01-20 10:38:05,670 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2019-01-20 10:38:05,681 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:38:05 BoogieIcfgContainer [2019-01-20 10:38:05,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-20 10:38:05,682 INFO L168 Benchmark]: Toolchain (without parser) took 12902.78 ms. Allocated memory was 141.0 MB in the beginning and 545.3 MB in the end (delta: 404.2 MB). Free memory was 107.4 MB in the beginning and 93.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 417.8 MB. Max. memory is 7.1 GB. [2019-01-20 10:38:05,683 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:38:05,684 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 141.0 MB. Free memory was 107.2 MB in the beginning and 105.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:38:05,684 INFO L168 Benchmark]: Boogie Preprocessor took 21.64 ms. Allocated memory is still 141.0 MB. Free memory was 105.1 MB in the beginning and 103.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-20 10:38:05,685 INFO L168 Benchmark]: RCFGBuilder took 324.35 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-01-20 10:38:05,686 INFO L168 Benchmark]: TraceAbstraction took 12498.36 ms. Allocated memory was 141.0 MB in the beginning and 545.3 MB in the end (delta: 404.2 MB). Free memory was 94.4 MB in the beginning and 93.8 MB in the end (delta: 601.6 kB). Peak memory consumption was 404.8 MB. Max. memory is 7.1 GB. [2019-01-20 10:38:05,690 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 141.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 141.0 MB. Free memory was 107.2 MB in the beginning and 105.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.64 ms. Allocated memory is still 141.0 MB. Free memory was 105.1 MB in the beginning and 103.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.35 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12498.36 ms. Allocated memory was 141.0 MB in the beginning and 545.3 MB in the end (delta: 404.2 MB). Free memory was 94.4 MB in the beginning and 93.8 MB in the end (delta: 601.6 kB). Peak memory consumption was 404.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && 0 == #memory_int[p1 := #memory_int[p1] + 1][p2]) || (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && #memory_int[p1 := #memory_int[p1] + 1][p2] + 1 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 12.4s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 31 SDslu, 1 SDs, 0 SdLazy, 175 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.6s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 101 HoareAnnotationTreeSize, 1 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 561 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 47 ConstructedInterpolants, 4 QuantifiedInterpolants, 1521 SizeOfPredicates, 11 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 9/30 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...