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/pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:16:45,179 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:16:45,181 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:16:45,193 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 19:16:45,193 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 19:16:45,194 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 19:16:45,196 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 19:16:45,197 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 19:16:45,199 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 19:16:45,200 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 19:16:45,201 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 19:16:45,223 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 19:16:45,239 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:16:45,239 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:16:45,240 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:16:45,240 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:16:45,240 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:16:45,241 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:16:45,241 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:16:45,241 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:16:45,241 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:16:45,241 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:16:45,242 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:16:45,242 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:16:45,242 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:16:45,242 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:16:45,243 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:16:45,243 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:16:45,243 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:16:45,243 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:16:45,244 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:16:45,244 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:16:45,244 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:16:45,244 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:16:45,244 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:16:45,245 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:16:45,245 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:16:45,245 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:16:45,245 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:16:45,245 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:16:45,246 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:16:45,246 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:16:45,246 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:16:45,246 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:16:45,246 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:16:45,247 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:16:45,247 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:16:45,247 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:16:45,247 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:16:45,247 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:16:45,248 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:16:45,248 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:16:45,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:16:45,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:16:45,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:16:45,296 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:16:45,297 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:16:45,298 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl [2018-12-03 19:16:45,298 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl' [2018-12-03 19:16:45,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:16:45,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:16:45,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:16:45,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:16:45,362 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:16:45,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:16:45,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:16:45,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:16:45,407 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:16:45,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/1) ... [2018-12-03 19:16:45,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:16:45,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:16:45,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:16:45,461 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:16:45,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (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 19:16:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 19:16:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 19:16:46,028 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 19:16:46,029 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 19:16:46,029 INFO L202 PluginConnector]: Adding new model pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:16:46 BoogieIcfgContainer [2018-12-03 19:16:46,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:16:46,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:16:46,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:16:46,034 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:16:46,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:16:45" (1/2) ... [2018-12-03 19:16:46,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bafe383 and model type pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:16:46, skipping insertion in model container [2018-12-03 19:16:46,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:16:46" (2/2) ... [2018-12-03 19:16:46,037 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl [2018-12-03 19:16:46,047 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:16:46,055 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:16:46,071 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:16:46,101 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:16:46,101 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:16:46,102 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:16:46,102 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:16:46,102 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:16:46,102 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:16:46,102 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:16:46,103 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:16:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-12-03 19:16:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 19:16:46,122 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:46,123 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 19:16:46,126 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:46,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1167247609, now seen corresponding path program 1 times [2018-12-03 19:16:46,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:46,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:46,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,185 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:46,359 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 19:16:46,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:16:46,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:16:46,363 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:16:46,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:16:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:16:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:16:46,383 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2018-12-03 19:16:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:16:46,430 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2018-12-03 19:16:46,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:16:46,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-12-03 19:16:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:16:46,449 INFO L225 Difference]: With dead ends: 42 [2018-12-03 19:16:46,449 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 19:16:46,453 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 19:16:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 19:16:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-12-03 19:16:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 19:16:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2018-12-03 19:16:46,493 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 13 [2018-12-03 19:16:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:16:46,494 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2018-12-03 19:16:46,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:16:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2018-12-03 19:16:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 19:16:46,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:46,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 19:16:46,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:46,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1352712325, now seen corresponding path program 1 times [2018-12-03 19:16:46,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:46,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:46,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,499 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:46,666 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 19:16:46,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:16:46,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 19:16:46,667 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:16:46,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 19:16:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 19:16:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 19:16:46,670 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2018-12-03 19:16:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:16:46,738 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2018-12-03 19:16:46,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 19:16:46,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-12-03 19:16:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:16:46,741 INFO L225 Difference]: With dead ends: 53 [2018-12-03 19:16:46,741 INFO L226 Difference]: Without dead ends: 51 [2018-12-03 19:16:46,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 19:16:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-03 19:16:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2018-12-03 19:16:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 19:16:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-12-03 19:16:46,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 13 [2018-12-03 19:16:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:16:46,754 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-12-03 19:16:46,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 19:16:46,754 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-12-03 19:16:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 19:16:46,755 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:46,755 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 19:16:46,755 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:46,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1352652743, now seen corresponding path program 1 times [2018-12-03 19:16:46,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:46,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:46,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:46,758 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:46,893 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 19:16:46,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:16:46,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 19:16:46,897 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:16:46,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 19:16:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 19:16:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 19:16:46,901 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 4 states. [2018-12-03 19:16:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:16:47,100 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2018-12-03 19:16:47,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 19:16:47,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-12-03 19:16:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:16:47,102 INFO L225 Difference]: With dead ends: 97 [2018-12-03 19:16:47,102 INFO L226 Difference]: Without dead ends: 69 [2018-12-03 19:16:47,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 19:16:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-03 19:16:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-03 19:16:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 19:16:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2018-12-03 19:16:47,123 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 13 [2018-12-03 19:16:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:16:47,123 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2018-12-03 19:16:47,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 19:16:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2018-12-03 19:16:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-03 19:16:47,125 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:47,126 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 19:16:47,126 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:47,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 90659497, now seen corresponding path program 1 times [2018-12-03 19:16:47,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:47,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:47,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,129 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 19:16:47,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:16:47,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:16:47,219 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:16:47,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:16:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:16:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:16:47,221 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand 3 states. [2018-12-03 19:16:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:16:47,287 INFO L93 Difference]: Finished difference Result 163 states and 214 transitions. [2018-12-03 19:16:47,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:16:47,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-12-03 19:16:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:16:47,290 INFO L225 Difference]: With dead ends: 163 [2018-12-03 19:16:47,290 INFO L226 Difference]: Without dead ends: 117 [2018-12-03 19:16:47,291 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 19:16:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-12-03 19:16:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-12-03 19:16:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-12-03 19:16:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2018-12-03 19:16:47,324 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 24 [2018-12-03 19:16:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:16:47,324 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2018-12-03 19:16:47,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:16:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2018-12-03 19:16:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-03 19:16:47,327 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:47,327 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-12-03 19:16:47,327 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:47,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash -726110997, now seen corresponding path program 1 times [2018-12-03 19:16:47,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:47,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:47,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,331 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-12-03 19:16:47,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:16:47,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 19:16:47,483 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:16:47,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:16:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:16:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:16:47,485 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand 3 states. [2018-12-03 19:16:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:16:47,572 INFO L93 Difference]: Finished difference Result 339 states and 435 transitions. [2018-12-03 19:16:47,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:16:47,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-12-03 19:16:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:16:47,577 INFO L225 Difference]: With dead ends: 339 [2018-12-03 19:16:47,578 INFO L226 Difference]: Without dead ends: 227 [2018-12-03 19:16:47,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:16:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-12-03 19:16:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2018-12-03 19:16:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-03 19:16:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 280 transitions. [2018-12-03 19:16:47,636 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 280 transitions. Word has length 46 [2018-12-03 19:16:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:16:47,638 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 280 transitions. [2018-12-03 19:16:47,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:16:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 280 transitions. [2018-12-03 19:16:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-03 19:16:47,641 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:16:47,643 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-12-03 19:16:47,644 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:16:47,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2107769241, now seen corresponding path program 1 times [2018-12-03 19:16:47,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:16:47,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:47,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:16:47,649 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:16:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:47,989 WARN L180 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2018-12-03 19:16:48,191 WARN L180 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 4 [2018-12-03 19:16:48,344 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 4 [2018-12-03 19:16:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-12-03 19:16:48,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:16:48,355 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:16:48,356 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-12-03 19:16:48,358 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [10], [14], [16], [18], [22], [24], [26], [30], [32], [36], [38], [40], [44], [46], [48] [2018-12-03 19:16:48,420 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:16:48,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 19:16:49,116 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-12-03 19:16:57,949 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 19:16:57,950 INFO L272 AbstractInterpreter]: Visited 19 different actions 184 times. Merged at 17 different actions 124 times. Widened at 8 different actions 33 times. Found 46 fixpoints after 9 different actions. Largest state had 0 variables. [2018-12-03 19:16:57,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:16:57,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 19:16:57,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:16:57,967 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:16:57,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:16:57,980 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:16:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:16:58,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:16:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-03 19:16:58,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:16:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-03 19:16:59,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:16:59,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2018-12-03 19:16:59,648 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:16:59,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 19:16:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 19:16:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-03 19:16:59,651 INFO L87 Difference]: Start difference. First operand 225 states and 280 transitions. Second operand 10 states. [2018-12-03 19:16:59,983 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-12-03 19:17:00,963 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-12-03 19:17:02,791 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-12-03 19:17:03,209 WARN L180 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-03 19:17:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:17:03,222 INFO L93 Difference]: Finished difference Result 541 states and 660 transitions. [2018-12-03 19:17:03,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 19:17:03,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-12-03 19:17:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:17:03,230 INFO L225 Difference]: With dead ends: 541 [2018-12-03 19:17:03,230 INFO L226 Difference]: Without dead ends: 196 [2018-12-03 19:17:03,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2018-12-03 19:17:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-12-03 19:17:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2018-12-03 19:17:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-03 19:17:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2018-12-03 19:17:03,298 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 46 [2018-12-03 19:17:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:17:03,298 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2018-12-03 19:17:03,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 19:17:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2018-12-03 19:17:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 19:17:03,301 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:17:03,302 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-12-03 19:17:03,302 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:17:03,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:17:03,303 INFO L82 PathProgramCache]: Analyzing trace with hash 702690737, now seen corresponding path program 2 times [2018-12-03 19:17:03,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:17:03,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:17:03,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:17:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:17:03,305 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:17:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:17:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-03 19:17:03,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:17:03,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:17:03,421 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:17:03,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:17:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:17:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:17:03,423 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand 3 states. [2018-12-03 19:17:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:17:03,430 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2018-12-03 19:17:03,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:17:03,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2018-12-03 19:17:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:17:03,430 INFO L225 Difference]: With dead ends: 157 [2018-12-03 19:17:03,431 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 19:17:03,431 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 19:17:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 19:17:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 19:17:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 19:17:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 19:17:03,432 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2018-12-03 19:17:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:17:03,433 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 19:17:03,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:17:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 19:17:03,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 19:17:03,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 19:17:04,494 WARN L180 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-12-03 19:17:04,751 WARN L180 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-12-03 19:17:04,874 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-12-03 19:17:05,039 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-12-03 19:17:05,189 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-12-03 19:17:05,389 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2018-12-03 19:17:05,569 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-12-03 19:17:05,776 INFO L444 ceAbstractionStarter]: At program point L225(lines 217 226) the Hoare annotation is: (let ((.cse6 (* 256 (div ~r1 256))) (.cse0 (<= 1 ~mode2)) (.cse1 (not (= ~p1_new ~nomsg))) (.cse2 (< 0 (+ (div ~send1 256) 1))) (.cse3 (<= ~send1 127)) (.cse4 (<= (div ~mode2 256) 0)) (.cse5 (= 0 (+ ~nomsg 1)))) (or (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= ~r1 .cse6)) (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ .cse6 2)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2018-12-03 19:17:05,777 INFO L444 ceAbstractionStarter]: At program point L289(lines 289 295) the Hoare annotation is: (and (not (= ~p1_old ~nomsg)) (= ULTIMATE.start_assert_~arg 1) (<= ~r1 (+ (* 256 (div ~r1 256)) 2)) (<= 1 ~mode2) (< 0 (+ (div ~send1 256) 1)) (<= 1 ULTIMATE.start_check_~tmp~63) (<= ~send1 127) (<= (div ~mode2 256) 0) (= 0 (+ ~nomsg 1))) [2018-12-03 19:17:05,777 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 51 301) no Hoare annotation was computed. [2018-12-03 19:17:05,777 INFO L444 ceAbstractionStarter]: At program point L184(lines 184 195) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div ~send1 256) 1))) (.cse2 (div ~mode2 256)) (.cse1 (<= ~send1 127)) (.cse3 (= 0 (+ ~nomsg 1)))) (or (and (not (= ~p1_old ~nomsg)) (<= 1 ~mode2) .cse0 .cse1 (<= .cse2 0) .cse3) (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) (= ~mode1 (* 256 (div ~mode1 256))) .cse0 (= ~mode2 (* 256 .cse2)) .cse1 .cse3 (<= ~r1 (* 256 (div ~r1 256)))))) [2018-12-03 19:17:05,777 INFO L444 ceAbstractionStarter]: At program point L279(lines 274 280) the Hoare annotation is: (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ (* 256 (div ~r1 256)) 2)) (<= 1 ~mode2) (< 0 (+ (div ~send1 256) 1)) (<= ~send1 127) (<= 1 ULTIMATE.start_check_~tmp~63) (<= (div ~mode2 256) 0) (= 0 (+ ~nomsg 1))) [2018-12-03 19:17:05,777 INFO L444 ceAbstractionStarter]: At program point L203(lines 194 204) the Hoare annotation is: (let ((.cse7 (div ~mode2 256))) (let ((.cse1 (<= 1 ~mode2)) (.cse5 (<= .cse7 0)) (.cse0 (not (= ~p1_old ~nomsg))) (.cse8 (* 256 (div ~r1 256))) (.cse2 (not (= ~p1_new ~nomsg))) (.cse3 (< 0 (+ (div ~send1 256) 1))) (.cse4 (<= ~send1 127)) (.cse6 (= 0 (+ ~nomsg 1)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (= ~mode1 (* 256 (div ~mode1 256))) .cse1 .cse3 .cse4 .cse5 .cse6) (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) .cse2 .cse3 (= ~mode2 (* 256 .cse7)) .cse4 .cse6 (<= ~r1 .cse8)) (and .cse0 (<= ~r1 (+ .cse8 2)) .cse2 .cse3 .cse4 .cse6)))) [2018-12-03 19:17:05,777 INFO L444 ceAbstractionStarter]: At program point L298(lines 298 299) the Hoare annotation is: false [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L230(lines 230 240) the Hoare annotation is: (let ((.cse6 (* 256 (div ~r1 256))) (.cse0 (<= 1 ~mode2)) (.cse1 (not (= ~p1_new ~nomsg))) (.cse2 (< 0 (+ (div ~send1 256) 1))) (.cse3 (<= ~send1 127)) (.cse4 (<= (div ~mode2 256) 0)) (.cse5 (= 0 (+ ~nomsg 1)))) (or (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= ~r1 .cse6)) (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ .cse6 2)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L294(lines 177 294) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div ~send1 256) 1))) (.cse2 (div ~mode2 256)) (.cse1 (<= ~send1 127)) (.cse3 (= 0 (+ ~nomsg 1)))) (or (and (not (= ~p1_old ~nomsg)) (<= 1 ~mode2) .cse0 .cse1 (<= .cse2 0) .cse3) (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) (= ~mode1 (* 256 (div ~mode1 256))) .cse0 (= ~mode2 (* 256 .cse2)) .cse1 .cse3 (<= ~r1 (* 256 (div ~r1 256)))))) [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L259(lines 259 265) the Hoare annotation is: (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ (* 256 (div ~r1 256)) 2)) (<= 1 ~mode2) (< 0 (+ (div ~send1 256) 1)) (<= ~send1 127) (<= (div ~mode2 256) 0) (= 0 (+ ~nomsg 1))) [2018-12-03 19:17:05,778 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 51 301) no Hoare annotation was computed. [2018-12-03 19:17:05,778 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 51 301) no Hoare annotation was computed. [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L247(lines 239 248) the Hoare annotation is: (let ((.cse6 (* 256 (div ~r1 256))) (.cse0 (<= 1 ~mode2)) (.cse1 (not (= ~p1_new ~nomsg))) (.cse2 (< 0 (+ (div ~send1 256) 1))) (.cse3 (<= ~send1 127)) (.cse4 (<= (div ~mode2 256) 0)) (.cse5 (= 0 (+ ~nomsg 1)))) (or (and (= (+ ~st3 ~st2 ~st1) 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= ~r1 .cse6)) (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ .cse6 2)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L208(lines 208 218) the Hoare annotation is: (let ((.cse7 (div ~mode2 256))) (let ((.cse1 (<= 1 ~mode2)) (.cse5 (<= .cse7 0)) (.cse0 (not (= ~p1_old ~nomsg))) (.cse8 (* 256 (div ~r1 256))) (.cse2 (not (= ~p1_new ~nomsg))) (.cse3 (< 0 (+ (div ~send1 256) 1))) (.cse4 (<= ~send1 127)) (.cse6 (= 0 (+ ~nomsg 1)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (= ~mode1 (* 256 (div ~mode1 256))) .cse1 .cse3 .cse4 .cse5 .cse6) (and (= (+ ~st3 ~st2 ~st1) 0) (= ~mode3 (* 256 (div ~mode3 256))) .cse2 .cse3 (= ~mode2 (* 256 .cse7)) .cse4 .cse6 (<= ~r1 .cse8)) (and .cse0 (<= ~r1 (+ .cse8 2)) .cse2 .cse3 .cse4 .cse6)))) [2018-12-03 19:17:05,778 INFO L444 ceAbstractionStarter]: At program point L268(lines 264 275) the Hoare annotation is: (and (not (= ~p1_old ~nomsg)) (<= ~r1 (+ (* 256 (div ~r1 256)) 2)) (<= 1 ~mode2) (< 0 (+ (div ~send1 256) 1)) (<= ~send1 127) (<= (div ~mode2 256) 0) (= 0 (+ ~nomsg 1))) [2018-12-03 19:17:05,779 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 300) no Hoare annotation was computed. [2018-12-03 19:17:05,796 INFO L202 PluginConnector]: Adding new model pals_lcr.3.ufo.UNBOUNDED.pals.c_14.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:17:05 BoogieIcfgContainer [2018-12-03 19:17:05,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 19:17:05,797 INFO L168 Benchmark]: Toolchain (without parser) took 20436.49 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-12-03 19:17:05,798 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:17:05,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.33 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:17:05,799 INFO L168 Benchmark]: Boogie Preprocessor took 53.54 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:17:05,800 INFO L168 Benchmark]: RCFGBuilder took 568.81 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-12-03 19:17:05,800 INFO L168 Benchmark]: TraceAbstraction took 19765.56 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-12-03 19:17:05,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.33 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.54 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 568.81 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19765.56 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 300]: 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: 298]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 208]: Loop Invariant Derived loop invariant: ((((((((!(~p1_old == ~nomsg) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) || ((((((!(~p1_old == ~nomsg) && ~mode1 == 256 * (~mode1 / 256)) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1)) || (((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~mode2 == 256 * (~mode2 / 256)) && ~send1 <= 127) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256))) || (((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && 0 == ~nomsg + 1) - InvariantResult [Line: 194]: Loop Invariant Derived loop invariant: ((((((((!(~p1_old == ~nomsg) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) || ((((((!(~p1_old == ~nomsg) && ~mode1 == 256 * (~mode1 / 256)) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1)) || (((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~mode2 == 256 * (~mode2 / 256)) && ~send1 <= 127) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256))) || (((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && 0 == ~nomsg + 1) - InvariantResult [Line: 177]: Loop Invariant Derived loop invariant: (((((!(~p1_old == ~nomsg) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) || (((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && ~mode1 == 256 * (~mode1 / 256)) && 0 < ~send1 / 256 + 1) && ~mode2 == 256 * (~mode2 / 256)) && ~send1 <= 127) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) - InvariantResult [Line: 230]: Loop Invariant Derived loop invariant: ((((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) || (((((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) - InvariantResult [Line: 217]: Loop Invariant Derived loop invariant: ((((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) || (((((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) - InvariantResult [Line: 289]: Loop Invariant Derived loop invariant: (((((((!(~p1_old == ~nomsg) && assert_~arg == 1) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && 1 <= check_~tmp~63) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1 - InvariantResult [Line: 264]: Loop Invariant Derived loop invariant: (((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1 - InvariantResult [Line: 239]: Loop Invariant Derived loop invariant: (((((((~st3 + ~st2 + ~st1 == 0 && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) || (((((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && !(~p1_new == ~nomsg)) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) - InvariantResult [Line: 274]: Loop Invariant Derived loop invariant: ((((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && 1 <= check_~tmp~63) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1 - InvariantResult [Line: 184]: Loop Invariant Derived loop invariant: (((((!(~p1_old == ~nomsg) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1) || (((((((~st3 + ~st2 + ~st1 == 0 && ~mode3 == 256 * (~mode3 / 256)) && ~mode1 == 256 * (~mode1 / 256)) && 0 < ~send1 / 256 + 1) && ~mode2 == 256 * (~mode2 / 256)) && ~send1 <= 127) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) - InvariantResult [Line: 259]: Loop Invariant Derived loop invariant: (((((!(~p1_old == ~nomsg) && ~r1 <= 256 * (~r1 / 256) + 2) && 1 <= ~mode2) && 0 < ~send1 / 256 + 1) && ~send1 <= 127) && ~mode2 / 256 <= 0) && 0 == ~nomsg + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. SAFE Result, 19.6s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 4.1s AutomataDifference, 0.0s DeadEndRemovalTime, 2.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 151 SDtfs, 204 SDslu, 174 SDs, 0 SdLazy, 406 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=225occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 67 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 12 PreInvPairs, 139 NumberOfFragments, 875 HoareAnnotationTreeSize, 12 FomulaSimplifications, 6523 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 434 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 269 NumberOfCodeBlocks, 269 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 306 ConstructedInterpolants, 28 QuantifiedInterpolants, 80621 SizeOfPredicates, 10 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 346/440 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...