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/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:37:35,032 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:37:35,034 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:37:35,046 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 19:37:35,046 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 19:37:35,047 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 19:37:35,048 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 19:37:35,050 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 19:37:35,052 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 19:37:35,052 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 19:37:35,053 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 19:37:35,054 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 19:37:35,054 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 19:37:35,055 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 19:37:35,056 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 19:37:35,057 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 19:37:35,058 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 19:37:35,060 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 19:37:35,062 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 19:37:35,063 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 19:37:35,064 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 19:37:35,065 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 19:37:35,068 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-12-03 19:37:35,076 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 19:37:35,088 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:37:35,089 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:37:35,089 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:37:35,090 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:37:35,090 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:37:35,090 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:37:35,090 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:37:35,090 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:37:35,091 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:37:35,091 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:37:35,091 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:37:35,091 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:37:35,091 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:37:35,092 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:37:35,092 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:37:35,092 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:37:35,093 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:37:35,093 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:37:35,093 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:37:35,093 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:37:35,093 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:37:35,094 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:37:35,094 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:37:35,094 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:37:35,094 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:37:35,094 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:37:35,095 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:37:35,095 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:37:35,095 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:37:35,095 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:37:35,095 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:37:35,096 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:37:35,096 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:37:35,096 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:37:35,096 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:37:35,096 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:37:35,097 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:37:35,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:37:35,097 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:37:35,097 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:37:35,145 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:37:35,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:37:35,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:37:35,162 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:37:35,163 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:37:35,164 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-12-03 19:37:35,164 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-12-03 19:37:35,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:37:35,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:37:35,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:37:35,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:37:35,198 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:37:35,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,231 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 19:37:35,231 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 19:37:35,231 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 19:37:35,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:37:35,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:37:35,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:37:35,235 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:37:35,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/1) ... [2018-12-03 19:37:35,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:37:35,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:37:35,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:37:35,258 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:37:35,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (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 19:37:35,327 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-12-03 19:37:35,327 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-12-03 19:37:35,327 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-12-03 19:37:35,398 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-03 19:37:35,540 INFO L272 CfgBuilder]: Using library mode [2018-12-03 19:37:35,540 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 19:37:35,541 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:37:35 BoogieIcfgContainer [2018-12-03 19:37:35,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:37:35,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:37:35,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:37:35,546 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:37:35,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:37:35" (1/2) ... [2018-12-03 19:37:35,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de9c9 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:37:35, skipping insertion in model container [2018-12-03 19:37:35,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:37:35" (2/2) ... [2018-12-03 19:37:35,550 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-12-03 19:37:35,561 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:37:35,571 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:37:35,591 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:37:35,637 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:37:35,637 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:37:35,637 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:37:35,638 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:37:35,638 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:37:35,638 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:37:35,638 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:37:35,638 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:37:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 19:37:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 19:37:35,672 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:35,673 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 19:37:35,676 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:35,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-12-03 19:37:35,693 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:35,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:35,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:35,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:35,750 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:35,783 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:35,783 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:35,784 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:35,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:35,800 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:35,827 INFO L193 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-12-03 19:37:35,829 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:35,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:35,830 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:35,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:35,842 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:37:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:35,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:36,127 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 19:37:36,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:36,219 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 19:37:36,239 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:37:36,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-12-03 19:37:36,240 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:37:36,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 19:37:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 19:37:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-03 19:37:36,260 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-12-03 19:37:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:36,365 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 19:37:36,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 19:37:36,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 19:37:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:36,377 INFO L225 Difference]: With dead ends: 10 [2018-12-03 19:37:36,378 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 19:37:36,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-03 19:37:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 19:37:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 19:37:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 19:37:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 19:37:36,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 19:37:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:36,413 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 19:37:36,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 19:37:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 19:37:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 19:37:36,414 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:36,414 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 19:37:36,415 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:36,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-12-03 19:37:36,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:36,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:36,417 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:36,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:36,422 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:36,422 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:36,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:36,435 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:36,475 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-03 19:37:36,477 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9] [2018-12-03 19:37:36,541 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:37:36,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 19:37:36,699 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 19:37:36,703 INFO L272 AbstractInterpreter]: Visited 5 different actions 14 times. Merged at 3 different actions 8 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 19:37:36,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:36,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 19:37:36,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:36,718 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:36,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:36,731 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:37:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:36,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:36,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:37,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:37,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-12-03 19:37:37,281 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:37,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 19:37:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 19:37:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-12-03 19:37:37,284 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2018-12-03 19:37:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:37,385 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 19:37:37,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 19:37:37,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-03 19:37:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:37,386 INFO L225 Difference]: With dead ends: 9 [2018-12-03 19:37:37,387 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 19:37:37,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-03 19:37:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 19:37:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 19:37:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 19:37:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 19:37:37,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 19:37:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:37,395 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 19:37:37,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 19:37:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 19:37:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 19:37:37,396 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:37,396 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 19:37:37,396 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:37,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-12-03 19:37:37,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:37,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:37,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:37,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:37,399 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:37,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:37,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:37,404 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:37,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:37,414 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:37,439 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:37:37,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:37,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:37,439 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:37,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:37:37,449 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:37:37,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 19:37:37,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:37:37,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:37,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:37,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:37,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-12-03 19:37:37,844 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:37,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 19:37:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 19:37:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-03 19:37:37,845 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-12-03 19:37:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:38,633 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-03 19:37:38,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 19:37:38,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-03 19:37:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:38,634 INFO L225 Difference]: With dead ends: 12 [2018-12-03 19:37:38,634 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 19:37:38,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-12-03 19:37:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 19:37:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 19:37:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 19:37:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 19:37:38,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-12-03 19:37:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:38,640 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 19:37:38,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 19:37:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 19:37:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 19:37:38,641 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:38,641 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-12-03 19:37:38,642 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:38,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 3 times [2018-12-03 19:37:38,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:38,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:38,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:38,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:38,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:38,652 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:38,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:38,652 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:38,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:38,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:38,696 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:37:38,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:38,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:38,697 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:38,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:37:38,707 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:37:38,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:37:38,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:37:38,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:38,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:39,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:39,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-12-03 19:37:39,100 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:39,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 19:37:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 19:37:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-12-03 19:37:39,102 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 14 states. [2018-12-03 19:37:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:39,804 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-12-03 19:37:39,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 19:37:39,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-12-03 19:37:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:39,806 INFO L225 Difference]: With dead ends: 16 [2018-12-03 19:37:39,807 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 19:37:39,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2018-12-03 19:37:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 19:37:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-03 19:37:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-03 19:37:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-03 19:37:39,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2018-12-03 19:37:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:39,814 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-03 19:37:39,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 19:37:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-03 19:37:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-03 19:37:39,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:39,815 INFO L402 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-12-03 19:37:39,815 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:39,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 4 times [2018-12-03 19:37:39,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:39,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:39,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:39,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:39,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:39,827 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:39,828 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:39,828 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:39,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:39,842 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:39,870 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:37:39,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:39,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:39,871 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:39,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:39,882 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:37:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:39,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:40,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:40,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:40,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-12-03 19:37:40,547 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:40,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 19:37:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 19:37:40,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-12-03 19:37:40,549 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 22 states. [2018-12-03 19:37:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:41,961 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-12-03 19:37:41,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 19:37:41,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 12 [2018-12-03 19:37:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:41,963 INFO L225 Difference]: With dead ends: 24 [2018-12-03 19:37:41,963 INFO L226 Difference]: Without dead ends: 21 [2018-12-03 19:37:41,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2018-12-03 19:37:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-03 19:37:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-03 19:37:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 19:37:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-03 19:37:41,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2018-12-03 19:37:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:41,975 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-03 19:37:41,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 19:37:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-03 19:37:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 19:37:41,976 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:41,976 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-12-03 19:37:41,977 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:41,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 5 times [2018-12-03 19:37:41,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:41,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:41,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:37:41,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:41,978 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:41,996 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:41,996 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:41,996 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:42,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:42,023 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:42,093 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:37:42,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:42,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:42,093 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:42,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:37:42,102 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:37:42,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 19:37:42,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:37:42,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:42,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:43,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:43,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-12-03 19:37:43,901 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:43,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 19:37:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 19:37:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 19:37:43,904 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 38 states. [2018-12-03 19:37:45,575 WARN L180 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2018-12-03 19:37:45,917 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-03 19:37:46,139 WARN L180 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-12-03 19:37:46,355 WARN L180 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-03 19:37:46,613 WARN L180 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2018-12-03 19:37:46,806 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2018-12-03 19:37:48,705 WARN L180 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-12-03 19:37:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:37:48,727 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2018-12-03 19:37:48,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 19:37:48,728 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 20 [2018-12-03 19:37:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:37:48,729 INFO L225 Difference]: With dead ends: 40 [2018-12-03 19:37:48,729 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 19:37:48,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1177, Invalid=3793, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 19:37:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 19:37:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-03 19:37:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-03 19:37:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-12-03 19:37:48,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 20 [2018-12-03 19:37:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:37:48,760 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-12-03 19:37:48,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 19:37:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-12-03 19:37:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 19:37:48,761 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:37:48,761 INFO L402 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-12-03 19:37:48,762 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:37:48,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:37:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 6 times [2018-12-03 19:37:48,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:37:48,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:48,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:48,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:37:48,763 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:37:48,792 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:37:48,793 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:37:48,793 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:37:48,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:37:48,824 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:37:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:37:49,321 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:37:49,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:37:49,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:37:49,321 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:37:49,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:37:49,331 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:37:49,857 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:37:49,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:37:49,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:37:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:51,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:37:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:37:54,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:37:54,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-12-03 19:37:54,493 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:37:54,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 19:37:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 19:37:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2018-12-03 19:37:54,500 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 70 states. [2018-12-03 19:37:57,779 WARN L180 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2018-12-03 19:37:58,610 WARN L180 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2018-12-03 19:37:59,238 WARN L180 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2018-12-03 19:37:59,999 WARN L180 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2018-12-03 19:38:00,627 WARN L180 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2018-12-03 19:38:01,525 WARN L180 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2018-12-03 19:38:02,320 WARN L180 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2018-12-03 19:38:02,953 WARN L180 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2018-12-03 19:38:03,578 WARN L180 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2018-12-03 19:38:04,221 WARN L180 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2018-12-03 19:38:04,844 WARN L180 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2018-12-03 19:38:05,423 WARN L180 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-12-03 19:38:05,949 WARN L180 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2018-12-03 19:38:06,464 WARN L180 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-12-03 19:38:07,043 WARN L180 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2018-12-03 19:38:07,492 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2018-12-03 19:38:07,938 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-12-03 19:38:08,362 WARN L180 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2018-12-03 19:38:09,084 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-12-03 19:38:09,449 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-03 19:38:09,834 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-03 19:38:10,283 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2018-12-03 19:38:13,435 WARN L180 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2018-12-03 19:38:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:38:13,475 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2018-12-03 19:38:13,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 19:38:13,476 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 36 [2018-12-03 19:38:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:38:13,478 INFO L225 Difference]: With dead ends: 72 [2018-12-03 19:38:13,478 INFO L226 Difference]: Without dead ends: 69 [2018-12-03 19:38:13,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=4377, Invalid=13713, Unknown=0, NotChecked=0, Total=18090 [2018-12-03 19:38:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-03 19:38:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-03 19:38:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 19:38:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-12-03 19:38:13,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 36 [2018-12-03 19:38:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:38:13,613 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-12-03 19:38:13,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 19:38:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-12-03 19:38:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 19:38:13,615 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:38:13,615 INFO L402 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-12-03 19:38:13,616 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:38:13,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:38:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 7 times [2018-12-03 19:38:13,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:38:13,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:38:13,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:38:13,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:38:13,617 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:38:13,661 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:38:13,661 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:38:13,662 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:38:13,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:38:13,673 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:38:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:38:13,971 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:38:13,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:38:13,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:38:13,971 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:38:13,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:38:13,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:38:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:38:19,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:38:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:38:22,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:38:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:38:31,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 19:38:31,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-12-03 19:38:31,156 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:38:31,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-12-03 19:38:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-12-03 19:38:31,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4302, Invalid=13520, Unknown=0, NotChecked=0, Total=17822 [2018-12-03 19:38:31,163 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 134 states. [2018-12-03 19:38:41,599 WARN L180 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 453 [2018-12-03 19:38:45,004 WARN L180 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 443 [2018-12-03 19:38:46,847 WARN L180 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 460 [2018-12-03 19:38:50,159 WARN L180 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 436 [2018-12-03 19:38:51,813 WARN L180 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 456 [2018-12-03 19:38:54,963 WARN L180 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 429 [2018-12-03 19:38:58,084 WARN L180 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 422 [2018-12-03 19:39:01,198 WARN L180 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2018-12-03 19:39:04,191 WARN L180 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 408 [2018-12-03 19:39:07,158 WARN L180 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 401 [2018-12-03 19:39:10,049 WARN L180 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2018-12-03 19:39:12,837 WARN L180 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2018-12-03 19:39:15,497 WARN L180 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 380 [2018-12-03 19:39:18,077 WARN L180 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 373 [2018-12-03 19:39:20,606 WARN L180 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2018-12-03 19:39:23,034 WARN L180 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2018-12-03 19:39:25,398 WARN L180 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2018-12-03 19:39:27,741 WARN L180 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2018-12-03 19:39:30,030 WARN L180 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2018-12-03 19:39:32,234 WARN L180 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2018-12-03 19:39:34,434 WARN L180 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2018-12-03 19:39:36,484 WARN L180 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2018-12-03 19:39:38,554 WARN L180 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2018-12-03 19:39:40,516 WARN L180 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2018-12-03 19:39:42,434 WARN L180 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2018-12-03 19:39:44,272 WARN L180 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2018-12-03 19:39:46,064 WARN L180 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2018-12-03 19:39:47,863 WARN L180 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2018-12-03 19:39:49,543 WARN L180 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2018-12-03 19:39:51,195 WARN L180 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2018-12-03 19:39:52,806 WARN L180 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2018-12-03 19:39:54,299 WARN L180 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2018-12-03 19:39:55,789 WARN L180 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2018-12-03 19:39:57,232 WARN L180 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2018-12-03 19:39:58,627 WARN L180 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2018-12-03 19:39:59,959 WARN L180 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2018-12-03 19:40:01,279 WARN L180 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2018-12-03 19:40:02,524 WARN L180 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2018-12-03 19:40:03,736 WARN L180 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2018-12-03 19:40:04,887 WARN L180 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2018-12-03 19:40:06,019 WARN L180 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2018-12-03 19:40:07,119 WARN L180 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2018-12-03 19:40:08,166 WARN L180 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2018-12-03 19:40:09,158 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-12-03 19:40:10,116 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2018-12-03 19:40:11,024 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-12-03 19:40:11,904 WARN L180 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2018-12-03 19:40:12,758 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2018-12-03 19:40:13,575 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-12-03 19:40:14,391 WARN L180 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2018-12-03 19:40:15,127 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-12-03 19:40:15,820 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-03 19:40:16,472 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-03 19:40:23,563 WARN L180 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 455 [2018-12-03 19:40:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:40:23,666 INFO L93 Difference]: Finished difference Result 136 states and 199 transitions. [2018-12-03 19:40:23,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-12-03 19:40:23,666 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 68 [2018-12-03 19:40:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:40:23,669 INFO L225 Difference]: With dead ends: 136 [2018-12-03 19:40:23,669 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 19:40:23,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8566 ImplicationChecksByTransitivity, 118.1s TimeCoverageRelationStatistics Valid=16921, Invalid=51985, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 19:40:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 19:40:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-12-03 19:40:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-12-03 19:40:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-12-03 19:40:23,861 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 68 [2018-12-03 19:40:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:40:23,861 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-12-03 19:40:23,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-12-03 19:40:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-12-03 19:40:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-12-03 19:40:23,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:40:23,865 INFO L402 BasicCegarLoop]: trace histogram [128, 1, 1, 1, 1] [2018-12-03 19:40:23,865 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 19:40:23,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:40:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2011374628, now seen corresponding path program 8 times [2018-12-03 19:40:23,866 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:40:23,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:40:23,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:40:23,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:40:23,867 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:40:23,927 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 19:40:23,927 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 19:40:23,928 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 19:40:23,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:40:23,948 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 19:40:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-03 19:40:25,996 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-12-03 19:40:25,996 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 19:40:26,027 WARN L228 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-12-03 19:40:26,027 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:40:26 BoogieIcfgContainer [2018-12-03 19:40:26,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 19:40:26,028 INFO L168 Benchmark]: Toolchain (without parser) took 170832.27 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 338.0 MB. Max. memory is 7.1 GB. [2018-12-03 19:40:26,029 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:40:26,030 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:40:26,030 INFO L168 Benchmark]: Boogie Preprocessor took 22.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:40:26,030 INFO L168 Benchmark]: RCFGBuilder took 284.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 19:40:26,031 INFO L168 Benchmark]: TraceAbstraction took 170485.17 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 316.8 MB. Max. memory is 7.1 GB. [2018-12-03 19:40:26,034 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 284.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 170485.17 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 316.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L9-L10] requires b >= 0; [L15] res := 0; [L16] tmp := b; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND TRUE tmp > 0 [L20] res := res + a; [L21] tmp := tmp - 1; [L18] COND FALSE !(tmp > 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. UNKNOWN Result, 170.4s OverallTime, 9 OverallIterations, 128 TraceHistogramMax, 139.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 15 SDtfs, 2931 SDslu, 9 SDs, 0 SdLazy, 6801 SolverSat, 3162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 562 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11626 ImplicationChecksByTransitivity, 148.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 20.2s InterpolantComputationTime, 450 NumberOfCodeBlocks, 450 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 302 ConstructedInterpolants, 7 QuantifiedInterpolants, 163296 SizeOfPredicates, 23 NumberOfNonLiveVariables, 707 ConjunctsInSsa, 556 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/5588 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...