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_compound_oct_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1_variant.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:31:40,802 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:31:40,804 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:31:40,820 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 17:31:40,820 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 17:31:40,822 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 17:31:40,824 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 17:31:40,827 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 17:31:40,830 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 17:31:40,837 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 17:31:40,838 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 17:31:40,838 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 17:31:40,839 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 17:31:40,844 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 17:31:40,845 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 17:31:40,849 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 17:31:40,850 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 17:31:40,853 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 17:31:40,857 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 17:31:40,863 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 17:31:40,865 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 17:31:40,867 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 17:31:40,870 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 17:31:40,871 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 17:31:40,871 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 17:31:40,872 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 17:31:40,874 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 17:31:40,875 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 17:31:40,877 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 17:31:40,878 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 17:31:40,878 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 17:31:40,881 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 17:31:40,881 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 17:31:40,882 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 17:31:40,884 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 17:31:40,885 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 17:31:40,886 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 17:31:40,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:31:40,910 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:31:40,911 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:31:40,913 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:31:40,913 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:31:40,914 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:31:40,914 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:31:40,914 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:31:40,914 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:31:40,915 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:31:40,915 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:31:40,915 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:31:40,915 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:31:40,916 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:31:40,917 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:31:40,917 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:31:40,917 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:31:40,917 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:31:40,918 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:31:40,919 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:31:40,919 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:31:40,920 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:31:40,920 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:31:40,920 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:31:40,920 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:31:40,921 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:31:40,921 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:31:40,921 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:31:40,921 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:31:40,921 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:31:40,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:31:40,922 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:31:40,922 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:31:40,922 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:31:40,922 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:31:40,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:31:40,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:31:40,923 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:31:40,923 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:31:40,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:31:41,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:31:41,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:31:41,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:31:41,011 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:31:41,011 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1_variant.i_2.bpl [2018-12-03 17:31:41,012 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1_variant.i_2.bpl' [2018-12-03 17:31:41,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:31:41,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:31:41,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:31:41,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:31:41,058 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:31:41,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:31:41,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:31:41,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:31:41,100 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:31:41,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/1) ... [2018-12-03 17:31:41,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:31:41,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:31:41,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:31:41,129 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:31:41,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (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 17:31:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 17:31:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 17:31:41,407 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 17:31:41,407 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 17:31:41,410 INFO L202 PluginConnector]: Adding new model count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:31:41 BoogieIcfgContainer [2018-12-03 17:31:41,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:31:41,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:31:41,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:31:41,418 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:31:41,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:31:41" (1/2) ... [2018-12-03 17:31:41,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d2ea1b and model type count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:31:41, skipping insertion in model container [2018-12-03 17:31:41,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:31:41" (2/2) ... [2018-12-03 17:31:41,421 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i_2.bpl [2018-12-03 17:31:41,433 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:31:41,443 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:31:41,461 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:31:41,506 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:31:41,506 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:31:41,507 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:31:41,507 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:31:41,507 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:31:41,507 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:31:41,507 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:31:41,508 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:31:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-03 17:31:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 17:31:41,531 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:31:41,532 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 17:31:41,535 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:31:41,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:31:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-12-03 17:31:41,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:31:41,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:31:41,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:31:41,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:31:41,598 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:31:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:31:41,718 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 17:31:41,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:31:41,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 17:31:41,720 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:31:41,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 17:31:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 17:31:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 17:31:41,740 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-12-03 17:31:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:31:41,943 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-03 17:31:41,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:31:41,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 17:31:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:31:41,958 INFO L225 Difference]: With dead ends: 12 [2018-12-03 17:31:41,958 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 17:31:41,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 17:31:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 17:31:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-12-03 17:31:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 17:31:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 17:31:42,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-03 17:31:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:31:42,009 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 17:31:42,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 17:31:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 17:31:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 17:31:42,010 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:31:42,010 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 17:31:42,010 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:31:42,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:31:42,011 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-12-03 17:31:42,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:31:42,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:31:42,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:31:42,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:31:42,012 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:31:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:31:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:31:42,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:31:42,446 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:31:42,447 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-03 17:31:42,449 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [10] [2018-12-03 17:31:42,525 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:31:42,526 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:31:42,817 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 17:31:42,819 INFO L272 AbstractInterpreter]: Visited 4 different actions 22 times. Merged at 2 different actions 12 times. Widened at 2 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 17:31:42,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:31:42,845 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 17:31:42,892 INFO L227 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 50% of their original sizes. [2018-12-03 17:31:42,892 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 17:31:42,974 INFO L418 sIntCurrentIteration]: We unified 5 AI predicates to 5 [2018-12-03 17:31:42,975 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 17:31:42,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 17:31:42,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2018-12-03 17:31:42,976 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:31:42,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 17:31:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 17:31:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 17:31:42,978 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-12-03 17:31:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:31:43,072 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-03 17:31:43,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:31:43,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-12-03 17:31:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:31:43,073 INFO L225 Difference]: With dead ends: 7 [2018-12-03 17:31:43,074 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 17:31:43,075 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-12-03 17:31:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 17:31:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 17:31:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 17:31:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 17:31:43,076 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-12-03 17:31:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:31:43,076 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 17:31:43,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 17:31:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 17:31:43,077 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 17:31:43,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 17:31:43,411 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-12-03 17:31:43,584 WARN L180 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2018-12-03 17:31:43,587 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 35) no Hoare annotation was computed. [2018-12-03 17:31:43,587 INFO L444 ceAbstractionStarter]: At program point L32(lines 32 33) the Hoare annotation is: false [2018-12-03 17:31:43,587 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 35) no Hoare annotation was computed. [2018-12-03 17:31:43,588 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 35) no Hoare annotation was computed. [2018-12-03 17:31:43,589 INFO L444 ceAbstractionStarter]: At program point L28(lines 13 28) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~4))) (let ((.cse0 (<= 0 .cse2))) (or (and (<= ULTIMATE.start_main_~i~4 0) .cse0) (let ((.cse1 (* 2 ULTIMATE.start___VERIFIER_assert_~cond))) (and (<= 2 .cse1) .cse0 (<= .cse2 2000000) (<= .cse1 2)))))) [2018-12-03 17:31:43,589 INFO L444 ceAbstractionStarter]: At program point L20(lines 20 29) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start___VERIFIER_assert_~cond))) (and (<= 2 .cse0) (<= 1 (+ ULTIMATE.start___VERIFIER_assert_~cond ULTIMATE.start_main_~i~4)) (<= .cse0 2) (<= (* 2 ULTIMATE.start_main_~i~4) 1999998))) [2018-12-03 17:31:43,589 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 34) no Hoare annotation was computed. [2018-12-03 17:31:43,611 INFO L202 PluginConnector]: Adding new model count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:31:43 BoogieIcfgContainer [2018-12-03 17:31:43,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 17:31:43,612 INFO L168 Benchmark]: Toolchain (without parser) took 2556.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 714.1 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -721.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:31:43,616 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:31:43,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:31:43,618 INFO L168 Benchmark]: Boogie Preprocessor took 28.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:31:43,618 INFO L168 Benchmark]: RCFGBuilder took 281.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 17:31:43,619 INFO L168 Benchmark]: TraceAbstraction took 2198.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 714.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -742.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 17:31:43,627 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 281.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2198.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 714.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -742.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (main_~i~4 <= 0 && 0 <= 2 * main_~i~4) || (((2 <= 2 * __VERIFIER_assert_~cond && 0 <= 2 * main_~i~4) && 2 * main_~i~4 <= 2000000) && 2 * __VERIFIER_assert_~cond <= 2) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((2 <= 2 * __VERIFIER_assert_~cond && 1 <= __VERIFIER_assert_~cond + main_~i~4) && 2 * __VERIFIER_assert_~cond <= 2) && 2 * main_~i~4 <= 1999998 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 5 SDtfs, 2 SDslu, 5 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.8 AbsIntWeakeningRatio, 1.0 AbsIntAvgWeakeningVarsNumRemoved, 5.2 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 53 HoareAnnotationTreeSize, 3 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...