java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 22:14:03,393 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 22:14:03,395 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 22:14:03,411 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 22:14:03,411 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 22:14:03,412 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 22:14:03,414 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 22:14:03,415 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 22:14:03,417 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 22:14:03,420 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 22:14:03,421 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 22:14:03,421 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 22:14:03,422 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 22:14:03,423 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 22:14:03,426 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 22:14:03,426 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 22:14:03,427 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 22:14:03,429 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 22:14:03,434 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 22:14:03,436 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 22:14:03,437 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 22:14:03,439 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 22:14:03,441 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 22:14:03,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 22:14:03,442 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 22:14:03,443 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 22:14:03,444 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 22:14:03,444 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 22:14:03,445 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 22:14:03,446 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 22:14:03,447 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 22:14:03,447 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 22:14:03,450 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 22:14:03,471 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 22:14:03,471 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 22:14:03,472 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 22:14:03,473 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 22:14:03,473 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 22:14:03,473 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 22:14:03,473 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 22:14:03,473 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 22:14:03,474 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 22:14:03,474 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 22:14:03,474 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 22:14:03,474 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 22:14:03,474 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 22:14:03,475 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 22:14:03,476 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 22:14:03,476 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 22:14:03,476 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 22:14:03,476 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 22:14:03,476 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 22:14:03,477 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 22:14:03,477 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 22:14:03,477 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 22:14:03,477 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 22:14:03,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 22:14:03,478 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 22:14:03,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 22:14:03,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 22:14:03,478 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 22:14:03,479 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 22:14:03,479 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 22:14:03,479 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 22:14:03,479 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 22:14:03,479 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 22:14:03,480 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 22:14:03,480 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 22:14:03,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 22:14:03,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 22:14:03,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 22:14:03,562 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 22:14:03,562 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 22:14:03,564 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-07 22:14:03,630 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300ff6e9f/b3616c8313b944cbbaf62b1f8b548bf9/FLAGaa8475edb [2018-11-07 22:14:04,103 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 22:14:04,104 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-07 22:14:04,112 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300ff6e9f/b3616c8313b944cbbaf62b1f8b548bf9/FLAGaa8475edb [2018-11-07 22:14:04,130 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300ff6e9f/b3616c8313b944cbbaf62b1f8b548bf9 [2018-11-07 22:14:04,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 22:14:04,145 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 22:14:04,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 22:14:04,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 22:14:04,150 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 22:14:04,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ede70b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04, skipping insertion in model container [2018-11-07 22:14:04,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 22:14:04,187 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 22:14:04,367 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:14:04,371 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 22:14:04,390 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:14:04,405 INFO L193 MainTranslator]: Completed translation [2018-11-07 22:14:04,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04 WrapperNode [2018-11-07 22:14:04,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 22:14:04,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 22:14:04,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 22:14:04,407 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 22:14:04,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 22:14:04,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 22:14:04,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 22:14:04,430 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 22:14:04,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (1/1) ... [2018-11-07 22:14:04,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 22:14:04,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 22:14:04,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 22:14:04,454 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 22:14:04,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (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 [2018-11-07 22:14:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 22:14:04,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 22:14:04,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 22:14:04,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 22:14:04,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 22:14:04,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 22:14:04,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 22:14:04,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 22:14:04,934 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 22:14:04,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:14:04 BoogieIcfgContainer [2018-11-07 22:14:04,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 22:14:04,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 22:14:04,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 22:14:04,942 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 22:14:04,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 10:14:04" (1/3) ... [2018-11-07 22:14:04,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2834f955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:14:04, skipping insertion in model container [2018-11-07 22:14:04,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:14:04" (2/3) ... [2018-11-07 22:14:04,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2834f955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:14:04, skipping insertion in model container [2018-11-07 22:14:04,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:14:04" (3/3) ... [2018-11-07 22:14:04,947 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-07 22:14:04,958 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 22:14:04,965 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 22:14:04,982 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 22:14:05,014 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 22:14:05,015 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 22:14:05,015 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 22:14:05,015 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 22:14:05,015 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 22:14:05,015 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 22:14:05,015 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 22:14:05,016 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 22:14:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-07 22:14:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-07 22:14:05,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:14:05,045 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:14:05,048 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:14:05,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash 380045771, now seen corresponding path program 1 times [2018-11-07 22:14:05,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:14:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:05,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:14:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:05,102 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:14:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:05,182 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:14:05,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 22:14:05,183 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:14:05,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 22:14:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 22:14:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 22:14:05,208 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-11-07 22:14:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:14:05,232 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2018-11-07 22:14:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 22:14:05,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-11-07 22:14:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:14:05,243 INFO L225 Difference]: With dead ends: 35 [2018-11-07 22:14:05,243 INFO L226 Difference]: Without dead ends: 15 [2018-11-07 22:14:05,247 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 22:14:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-07 22:14:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-07 22:14:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-07 22:14:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-07 22:14:05,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-07 22:14:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:14:05,283 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-07 22:14:05,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 22:14:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-07 22:14:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-07 22:14:05,284 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:14:05,285 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:14:05,285 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:14:05,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:05,286 INFO L82 PathProgramCache]: Analyzing trace with hash 137515447, now seen corresponding path program 1 times [2018-11-07 22:14:05,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:14:05,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:05,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:14:05,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:05,288 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:14:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:05,722 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-11-07 22:14:05,927 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2018-11-07 22:14:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:06,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:14:06,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 22:14:06,181 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:14:06,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 22:14:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 22:14:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 22:14:06,184 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2018-11-07 22:14:06,344 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-11-07 22:14:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:14:06,592 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-07 22:14:06,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 22:14:06,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-11-07 22:14:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:14:06,594 INFO L225 Difference]: With dead ends: 23 [2018-11-07 22:14:06,594 INFO L226 Difference]: Without dead ends: 17 [2018-11-07 22:14:06,596 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 22:14:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-07 22:14:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-07 22:14:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-07 22:14:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-07 22:14:06,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-11-07 22:14:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:14:06,602 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-07 22:14:06,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 22:14:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-07 22:14:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-07 22:14:06,603 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:14:06,603 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:14:06,604 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:14:06,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash -431115791, now seen corresponding path program 1 times [2018-11-07 22:14:06,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:14:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:06,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:14:06,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:06,606 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:14:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:06,980 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-11-07 22:14:07,224 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-11-07 22:14:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:07,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:07,251 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:14:07,252 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-07 22:14:07,254 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [20], [22], [28], [35], [38], [40], [46], [47], [48], [50] [2018-11-07 22:14:07,284 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 22:14:07,284 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 22:14:07,605 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 22:14:07,607 INFO L272 AbstractInterpreter]: Visited 15 different actions 71 times. Merged at 4 different actions 28 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-11-07 22:14:07,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:07,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 22:14:07,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:07,662 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 22:14:07,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:14:07,677 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 22:14:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:07,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:14:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:07,909 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:14:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:08,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:14:08,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2018-11-07 22:14:08,172 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:14:08,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 22:14:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 22:14:08,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-11-07 22:14:08,177 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2018-11-07 22:14:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:14:08,403 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-07 22:14:08,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 22:14:08,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-11-07 22:14:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:14:08,406 INFO L225 Difference]: With dead ends: 25 [2018-11-07 22:14:08,406 INFO L226 Difference]: Without dead ends: 19 [2018-11-07 22:14:08,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-07 22:14:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-07 22:14:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-07 22:14:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-07 22:14:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-07 22:14:08,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-11-07 22:14:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:14:08,413 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-07 22:14:08,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 22:14:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-07 22:14:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-07 22:14:08,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:14:08,415 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:14:08,415 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:14:08,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:08,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1424888917, now seen corresponding path program 2 times [2018-11-07 22:14:08,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:14:08,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:08,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:14:08,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:08,417 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:14:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:08,622 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-11-07 22:14:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:08,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:08,783 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:14:08,783 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 22:14:08,784 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 22:14:08,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:08,784 INFO L194 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 [2018-11-07 22:14:08,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 22:14:08,800 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 22:14:08,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-07 22:14:08,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 22:14:08,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:14:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:08,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:14:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:09,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:14:09,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-11-07 22:14:09,160 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:14:09,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-07 22:14:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-07 22:14:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-11-07 22:14:09,162 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2018-11-07 22:14:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:14:09,393 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-07 22:14:09,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 22:14:09,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-11-07 22:14:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:14:09,395 INFO L225 Difference]: With dead ends: 31 [2018-11-07 22:14:09,395 INFO L226 Difference]: Without dead ends: 23 [2018-11-07 22:14:09,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-11-07 22:14:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-07 22:14:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-07 22:14:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-07 22:14:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-07 22:14:09,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-11-07 22:14:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:14:09,403 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-07 22:14:09,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-07 22:14:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-07 22:14:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-07 22:14:09,404 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:14:09,405 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:14:09,405 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:14:09,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:14:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1072393119, now seen corresponding path program 3 times [2018-11-07 22:14:09,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:14:09,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:09,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 22:14:09,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:14:09,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:14:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:14:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 22:14:09,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:09,770 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:14:09,771 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 22:14:09,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 22:14:09,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:14:09,771 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 22:14:09,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 22:14:09,780 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 22:14:09,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 22:14:09,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 22:14:09,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:14:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:10,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:14:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:14:10,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:14:10,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2018-11-07 22:14:10,281 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:14:10,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 22:14:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 22:14:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2018-11-07 22:14:10,283 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2018-11-07 22:14:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:14:10,509 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-07 22:14:10,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 22:14:10,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-11-07 22:14:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:14:10,511 INFO L225 Difference]: With dead ends: 27 [2018-11-07 22:14:10,511 INFO L226 Difference]: Without dead ends: 0 [2018-11-07 22:14:10,513 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2018-11-07 22:14:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-07 22:14:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-07 22:14:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-07 22:14:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-07 22:14:10,514 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-11-07 22:14:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:14:10,514 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-07 22:14:10,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 22:14:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-07 22:14:10,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-07 22:14:10,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-07 22:14:10,671 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-07 22:14:10,672 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:14:10,672 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:14:10,672 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-07 22:14:10,672 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-07 22:14:10,673 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-07 22:14:10,673 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 main_~z~0))) (and (<= .cse0 0) (<= 0 .cse0))) [2018-11-07 22:14:10,673 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-11-07 22:14:10,673 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 23) no Hoare annotation was computed. [2018-11-07 22:14:10,673 INFO L421 ceAbstractionStarter]: At program point L19-3(lines 19 23) the Hoare annotation is: (let ((.cse1 (+ main_~i~0 main_~y~0 main_~z~0)) (.cse0 (+ main_~x~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-11-07 22:14:10,673 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-07 22:14:10,674 INFO L425 ceAbstractionStarter]: For program point L19-4(lines 10 28) no Hoare annotation was computed. [2018-11-07 22:14:10,674 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-11-07 22:14:10,674 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-11-07 22:14:10,674 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-11-07 22:14:10,674 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-07 22:14:10,674 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-07 22:14:10,674 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-07 22:14:10,675 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-07 22:14:10,675 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-07 22:14:10,675 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-07 22:14:10,675 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-07 22:14:10,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 10:14:10 BoogieIcfgContainer [2018-11-07 22:14:10,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 22:14:10,688 INFO L168 Benchmark]: Toolchain (without parser) took 6543.62 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -393.8 MB). Peak memory consumption was 330.2 MB. Max. memory is 7.1 GB. [2018-11-07 22:14:10,690 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 22:14:10,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.07 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-07 22:14:10,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.33 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. [2018-11-07 22:14:10,692 INFO L168 Benchmark]: Boogie Preprocessor took 24.22 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. [2018-11-07 22:14:10,693 INFO L168 Benchmark]: RCFGBuilder took 481.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -772.9 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-11-07 22:14:10,694 INFO L168 Benchmark]: TraceAbstraction took 5751.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 368.4 MB). Peak memory consumption was 368.4 MB. Max. memory is 7.1 GB. [2018-11-07 22:14:10,699 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.07 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.33 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 24.22 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 481.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -772.9 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5751.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 368.4 MB). Peak memory consumption was 368.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x + j <= i + y + z && i + y + z <= x + j - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 5.6s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 25 SDslu, 309 SDs, 0 SdLazy, 266 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 33 HoareAnnotationTreeSize, 13 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 192 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 139 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 28213 SizeOfPredicates, 21 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 2/84 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...