java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 15:33:44,352 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 15:33:44,355 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 15:33:44,368 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 15:33:44,368 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 15:33:44,369 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 15:33:44,370 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 15:33:44,372 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 15:33:44,374 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 15:33:44,375 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 15:33:44,376 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 15:33:44,376 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 15:33:44,377 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 15:33:44,378 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 15:33:44,379 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 15:33:44,380 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 15:33:44,380 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 15:33:44,382 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 15:33:44,384 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 15:33:44,386 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 15:33:44,387 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 15:33:44,391 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 15:33:44,393 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 15:33:44,396 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 15:33:44,396 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 15:33:44,397 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 15:33:44,398 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 15:33:44,399 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 15:33:44,403 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 15:33:44,405 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 15:33:44,406 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 15:33:44,407 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 15:33:44,412 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 15:33:44,443 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 15:33:44,444 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 15:33:44,444 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 15:33:44,447 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 15:33:44,447 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 15:33:44,447 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 15:33:44,448 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 15:33:44,449 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 15:33:44,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 15:33:44,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 15:33:44,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 15:33:44,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 15:33:44,452 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 15:33:44,452 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 15:33:44,452 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 15:33:44,452 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 15:33:44,452 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 15:33:44,455 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 15:33:44,455 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 15:33:44,455 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 15:33:44,455 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 15:33:44,456 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 15:33:44,456 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 15:33:44,456 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 15:33:44,456 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 15:33:44,456 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 15:33:44,457 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 15:33:44,457 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 15:33:44,457 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 15:33:44,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 15:33:44,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 15:33:44,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 15:33:44,540 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 15:33:44,540 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 15:33:44,541 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-27 15:33:44,618 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af4cba42a/881ec314ddd44b28af23ef9475be95c1/FLAGb3306161e [2018-10-27 15:33:45,071 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 15:33:45,072 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-27 15:33:45,078 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af4cba42a/881ec314ddd44b28af23ef9475be95c1/FLAGb3306161e [2018-10-27 15:33:45,093 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af4cba42a/881ec314ddd44b28af23ef9475be95c1 [2018-10-27 15:33:45,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 15:33:45,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 15:33:45,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 15:33:45,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 15:33:45,111 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 15:33:45,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfdac62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45, skipping insertion in model container [2018-10-27 15:33:45,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 15:33:45,147 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 15:33:45,326 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:33:45,330 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 15:33:45,350 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:33:45,369 INFO L193 MainTranslator]: Completed translation [2018-10-27 15:33:45,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45 WrapperNode [2018-10-27 15:33:45,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 15:33:45,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 15:33:45,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 15:33:45,371 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 15:33:45,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 15:33:45,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 15:33:45,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 15:33:45,411 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 15:33:45,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... [2018-10-27 15:33:45,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 15:33:45,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 15:33:45,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 15:33:45,442 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 15:33:45,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 15:33:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 15:33:45,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 15:33:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 15:33:45,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 15:33:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 15:33:45,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 15:33:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 15:33:45,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 15:33:45,933 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 15:33:45,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:33:45 BoogieIcfgContainer [2018-10-27 15:33:45,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 15:33:45,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 15:33:45,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 15:33:45,938 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 15:33:45,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:33:45" (1/3) ... [2018-10-27 15:33:45,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253ae6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:33:45, skipping insertion in model container [2018-10-27 15:33:45,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:33:45" (2/3) ... [2018-10-27 15:33:45,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253ae6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:33:45, skipping insertion in model container [2018-10-27 15:33:45,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:33:45" (3/3) ... [2018-10-27 15:33:45,942 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call1_true-termination.i [2018-10-27 15:33:45,951 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 15:33:45,959 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 15:33:45,977 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 15:33:46,012 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 15:33:46,012 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 15:33:46,012 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 15:33:46,012 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 15:33:46,012 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 15:33:46,012 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 15:33:46,013 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 15:33:46,013 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 15:33:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-27 15:33:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 15:33:46,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:33:46,036 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:33:46,038 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:33:46,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:33:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash -173834890, now seen corresponding path program 1 times [2018-10-27 15:33:46,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:33:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:33:46,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,094 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:33:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:33:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:46,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:33:46,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 15:33:46,179 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:33:46,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 15:33:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 15:33:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 15:33:46,204 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-27 15:33:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:33:46,229 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-27 15:33:46,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 15:33:46,231 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-27 15:33:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:33:46,241 INFO L225 Difference]: With dead ends: 35 [2018-10-27 15:33:46,242 INFO L226 Difference]: Without dead ends: 15 [2018-10-27 15:33:46,246 INFO L605 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 [2018-10-27 15:33:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-27 15:33:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-27 15:33:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-27 15:33:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-27 15:33:46,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-27 15:33:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:33:46,285 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-27 15:33:46,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 15:33:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-27 15:33:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 15:33:46,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:33:46,287 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:33:46,287 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:33:46,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:33:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash -737648989, now seen corresponding path program 1 times [2018-10-27 15:33:46,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:33:46,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:33:46,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,290 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:33:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:33:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:46,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:33:46,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 15:33:46,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:33:46,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 15:33:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 15:33:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:33:46,419 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2018-10-27 15:33:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:33:46,463 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-27 15:33:46,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 15:33:46,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-27 15:33:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:33:46,466 INFO L225 Difference]: With dead ends: 24 [2018-10-27 15:33:46,467 INFO L226 Difference]: Without dead ends: 18 [2018-10-27 15:33:46,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:33:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-27 15:33:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-27 15:33:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 15:33:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-27 15:33:46,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-27 15:33:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:33:46,475 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-27 15:33:46,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 15:33:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-27 15:33:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 15:33:46,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:33:46,476 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:33:46,477 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:33:46,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:33:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1154592614, now seen corresponding path program 1 times [2018-10-27 15:33:46,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:33:46,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:33:46,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:46,479 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:33:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:33:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:46,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:33:46,580 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:33:46,581 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-27 15:33:46,585 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [27], [29], [35], [36], [37], [39] [2018-10-27 15:33:46,622 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:33:46,622 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:33:46,998 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 15:33:47,000 INFO L272 AbstractInterpreter]: Visited 15 different actions 38 times. Merged at 3 different actions 17 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-10-27 15:33:47,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:33:47,027 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 15:33:47,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:33:47,027 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 15:33:47,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:33:47,039 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:33:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:33:47,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:33:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:47,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:33:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:47,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:33:47,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-10-27 15:33:47,238 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:33:47,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 15:33:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 15:33:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-27 15:33:47,240 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2018-10-27 15:33:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:33:47,374 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-27 15:33:47,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:33:47,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-27 15:33:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:33:47,376 INFO L225 Difference]: With dead ends: 27 [2018-10-27 15:33:47,377 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 15:33:47,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-27 15:33:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 15:33:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-27 15:33:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 15:33:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-27 15:33:47,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-27 15:33:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:33:47,384 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-27 15:33:47,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 15:33:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-27 15:33:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 15:33:47,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:33:47,387 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:33:47,387 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:33:47,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:33:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1276704957, now seen corresponding path program 2 times [2018-10-27 15:33:47,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:33:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:47,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:33:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:33:47,390 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:33:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:33:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:33:47,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:33:47,513 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:33:47,513 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 15:33:47,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 15:33:47,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:33:47,514 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 15:33:47,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 15:33:47,531 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 15:33:47,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-27 15:33:47,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 15:33:47,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:33:47,657 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-27 15:33:47,673 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-27 15:33:47,673 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,699 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,766 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-27 15:33:47,883 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2018-10-27 15:33:47,896 INFO L682 Elim1Store]: detected equality via solver [2018-10-27 15:33:47,897 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-27 15:33:47,898 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,904 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-27 15:33:47,919 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:7 [2018-10-27 15:33:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 15:33:48,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:33:48,466 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-27 15:33:48,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-27 15:33:48,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-27 15:33:48,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:1 [2018-10-27 15:33:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 15:33:48,506 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 15:33:48,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5] total 16 [2018-10-27 15:33:48,506 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:33:48,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 15:33:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 15:33:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-27 15:33:48,508 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-27 15:33:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:33:49,163 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-27 15:33:49,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 15:33:49,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-27 15:33:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:33:49,164 INFO L225 Difference]: With dead ends: 20 [2018-10-27 15:33:49,164 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 15:33:49,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-27 15:33:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 15:33:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 15:33:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 15:33:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 15:33:49,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-10-27 15:33:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:33:49,167 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 15:33:49,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 15:33:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 15:33:49,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 15:33:49,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 15:33:49,234 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-27 15:33:49,235 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-27 15:33:49,235 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 15:33:49,235 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 15:33:49,236 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 15:33:49,236 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 15:33:49,236 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 15:33:49,236 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 15) the Hoare annotation is: true [2018-10-27 15:33:49,236 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 15) no Hoare annotation was computed. [2018-10-27 15:33:49,236 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (< main_~i~0 1025) (<= 1023 |main_#t~mem1|) (exists ((main_~i~0 Int)) (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0) (<= 1024 main_~i~0))) (< |main_#t~mem1| 1024) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) [2018-10-27 15:33:49,236 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 15) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point L11-3(lines 11 13) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 13) the Hoare annotation is: (or (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) (= main_~i~0 0)) [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point L11-5(lines 11 13) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-27 15:33:49,237 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-27 15:33:49,237 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-27 15:33:49,238 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-27 15:33:49,238 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-27 15:33:49,238 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-27 15:33:49,245 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-27 15:33:49,250 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-27 15:33:49,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:33:49 BoogieIcfgContainer [2018-10-27 15:33:49,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 15:33:49,254 INFO L168 Benchmark]: Toolchain (without parser) took 4149.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -652.3 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. [2018-10-27 15:33:49,256 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-27 15:33:49,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.60 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. [2018-10-27 15:33:49,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.14 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. [2018-10-27 15:33:49,259 INFO L168 Benchmark]: Boogie Preprocessor took 30.65 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. [2018-10-27 15:33:49,259 INFO L168 Benchmark]: RCFGBuilder took 492.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-27 15:33:49,260 INFO L168 Benchmark]: TraceAbstraction took 3318.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 140.9 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. [2018-10-27 15:33:49,265 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 263.60 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 39.14 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 30.65 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 492.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3318.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 140.9 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 11]: Loop Invariant [2018-10-27 15:33:49,273 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-27 15:33:49,273 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (i < 1025 && unknown-#memory_int-unknown[A][4 * i + A + -4] + 1 == i) || i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 58 SDtfs, 7 SDslu, 82 SDs, 0 SdLazy, 52 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 73 HoareAnnotationTreeSize, 10 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 95 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 1 QuantifiedInterpolants, 5848 SizeOfPredicates, 17 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 14/27 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...