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/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:07:00,863 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:07:00,865 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:07:00,885 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 19:07:00,886 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 19:07:00,887 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 19:07:00,888 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 19:07:00,894 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 19:07:00,898 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 19:07:00,900 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 19:07:00,901 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 19:07:00,901 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 19:07:00,902 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 19:07:00,903 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 19:07:00,904 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 19:07:00,905 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 19:07:00,906 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 19:07:00,908 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 19:07:00,910 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 19:07:00,911 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 19:07:00,912 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 19:07:00,913 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 19:07:00,916 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-12-03 19:07:00,925 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 [2018-12-03 19:07:00,937 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:07:00,938 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:07:00,939 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:07:00,939 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:07:00,939 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:07:00,939 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:07:00,939 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:07:00,940 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:07:00,940 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:07:00,940 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:07:00,940 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:07:00,940 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:07:00,941 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:07:00,941 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:07:00,941 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:07:00,942 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:07:00,942 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:07:00,942 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:07:00,942 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:07:00,942 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:07:00,942 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:07:00,943 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:07:00,943 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:07:00,943 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:07:00,943 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:07:00,943 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:07:00,944 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:07:00,944 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:07:00,944 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:07:00,944 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:07:00,944 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:07:00,945 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:07:00,945 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:07:00,945 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:07:00,945 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:07:00,945 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:07:00,946 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:07:00,946 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:07:00,946 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:07:00,946 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:07:00,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:07:00,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:07:00,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:07:00,993 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:07:00,994 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:07:00,994 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl [2018-12-03 19:07:00,995 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl' [2018-12-03 19:07:01,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:07:01,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:07:01,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:07:01,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:07:01,052 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:07:01,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:07:01,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:07:01,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:07:01,098 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:07:01,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/1) ... [2018-12-03 19:07:01,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:07:01,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:07:01,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:07:01,132 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:07:01,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (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 [2018-12-03 19:07:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 19:07:01,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 19:07:01,500 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 19:07:01,500 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 19:07:01,501 INFO L202 PluginConnector]: Adding new model mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:07:01 BoogieIcfgContainer [2018-12-03 19:07:01,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:07:01,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:07:01,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:07:01,507 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:07:01,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:07:01" (1/2) ... [2018-12-03 19:07:01,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b47ace1 and model type mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:07:01, skipping insertion in model container [2018-12-03 19:07:01,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:07:01" (2/2) ... [2018-12-03 19:07:01,511 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.c.i_3.bpl [2018-12-03 19:07:01,523 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:07:01,535 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:07:01,554 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:07:01,598 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:07:01,599 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:07:01,599 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:07:01,599 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:07:01,599 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:07:01,599 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:07:01,600 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:07:01,600 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:07:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 19:07:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 19:07:01,632 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:07:01,633 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 19:07:01,637 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:07:01,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:07:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-12-03 19:07:01,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:07:01,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:07:01,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:07:01,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:07:01,697 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:07:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:07:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:07:01,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:07:01,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:07:01,818 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:07:01,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:07:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:07:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:07:01,839 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 19:07:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:07:01,872 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 19:07:01,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:07:01,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 19:07:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:07:01,885 INFO L225 Difference]: With dead ends: 9 [2018-12-03 19:07:01,886 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 19:07:01,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:07:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 19:07:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 19:07:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 19:07:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 19:07:01,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 19:07:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:07:01,924 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 19:07:01,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:07:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 19:07:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 19:07:01,925 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:07:01,925 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 19:07:01,926 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:07:01,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:07:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-12-03 19:07:01,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:07:01,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:07:01,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:07:01,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:07:01,928 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:07:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:07:02,224 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-12-03 19:07:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:07:02,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:07:02,225 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:07:02,226 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 19:07:02,227 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 19:07:02,286 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:07:02,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2)