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-EXP.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:35:10,542 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:35:10,547 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:35:10,560 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:35:10,560 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:35:10,561 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:35:10,563 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:35:10,564 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:35:10,566 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:35:10,567 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:35:10,568 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:35:10,568 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:35:10,569 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:35:10,570 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:35:10,571 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:35:10,572 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:35:10,573 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:35:10,575 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:35:10,577 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:35:10,579 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:35:10,580 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:35:10,581 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:35:10,584 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:35:10,584 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:35:10,584 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:35:10,585 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:35:10,586 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:35:10,587 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:35:10,588 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:35:10,589 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:35:10,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:35:10,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:35:10,592 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:35:10,608 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:35:10,608 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:35:10,609 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:35:10,610 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:35:10,610 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:35:10,610 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:35:10,610 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:35:10,610 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:35:10,611 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:35:10,611 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:35:10,611 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:35:10,611 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:35:10,611 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:35:10,612 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:35:10,612 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:35:10,612 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:35:10,613 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:35:10,613 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:35:10,613 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:35:10,613 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:35:10,613 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:35:10,614 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:35:10,614 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:35:10,614 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:35:10,614 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:35:10,614 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:35:10,615 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:35:10,615 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:35:10,615 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:35:10,615 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:35:10,616 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:35:10,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:35:10,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:35:10,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:35:10,699 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:35:10,699 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:35:10,700 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-24 12:35:10,764 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ab3ff562/634a242da17047b99500b9ca500f7830/FLAG08e4b411a [2018-10-24 12:35:11,244 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:35:11,245 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-24 12:35:11,252 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ab3ff562/634a242da17047b99500b9ca500f7830/FLAG08e4b411a [2018-10-24 12:35:11,269 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ab3ff562/634a242da17047b99500b9ca500f7830 [2018-10-24 12:35:11,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:35:11,281 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:35:11,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:35:11,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:35:11,286 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:35:11,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336262d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11, skipping insertion in model container [2018-10-24 12:35:11,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:35:11,323 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:35:11,540 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:35:11,545 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:35:11,563 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:35:11,582 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:35:11,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11 WrapperNode [2018-10-24 12:35:11,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:35:11,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:35:11,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:35:11,584 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:35:11,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:35:11,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:35:11,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:35:11,607 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:35:11,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (1/1) ... [2018-10-24 12:35:11,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:35:11,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:35:11,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:35:11,631 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:35:11,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (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 [2018-10-24 12:35:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:35:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:35:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:35:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:35:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:35:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:35:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:35:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:35:12,064 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:35:12,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:12 BoogieIcfgContainer [2018-10-24 12:35:12,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:35:12,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:35:12,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:35:12,077 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:35:12,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:35:11" (1/3) ... [2018-10-24 12:35:12,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588de60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:12, skipping insertion in model container [2018-10-24 12:35:12,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:11" (2/3) ... [2018-10-24 12:35:12,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588de60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:12, skipping insertion in model container [2018-10-24 12:35:12,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:12" (3/3) ... [2018-10-24 12:35:12,082 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-10-24 12:35:12,104 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:35:12,114 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:35:12,136 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:35:12,176 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:35:12,176 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:35:12,176 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:35:12,176 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:35:12,177 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:35:12,177 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:35:12,177 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:35:12,177 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:35:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-24 12:35:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 12:35:12,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:35:12,204 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:35:12,207 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:35:12,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-10-24 12:35:12,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:35:12,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:35:12,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,277 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:35:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:12,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:35:12,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:35:12,339 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:35:12,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:35:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:35:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:35:12,364 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-24 12:35:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:35:12,389 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-24 12:35:12,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:35:12,391 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-24 12:35:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:35:12,401 INFO L225 Difference]: With dead ends: 33 [2018-10-24 12:35:12,401 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 12:35:12,405 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 [2018-10-24 12:35:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 12:35:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 12:35:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 12:35:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-24 12:35:12,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-24 12:35:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:35:12,448 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-24 12:35:12,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:35:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-24 12:35:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 12:35:12,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:35:12,449 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:35:12,450 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:35:12,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1404763780, now seen corresponding path program 1 times [2018-10-24 12:35:12,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:35:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:35:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,453 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:35:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:12,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:35:12,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:35:12,585 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:35:12,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:35:12,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:35:12,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:35:12,588 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-24 12:35:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:35:12,710 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-24 12:35:12,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:35:12,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-24 12:35:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:35:12,714 INFO L225 Difference]: With dead ends: 23 [2018-10-24 12:35:12,714 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 12:35:12,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:35:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 12:35:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 12:35:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 12:35:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-24 12:35:12,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2018-10-24 12:35:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:35:12,721 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-24 12:35:12,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:35:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-24 12:35:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 12:35:12,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:35:12,723 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:35:12,723 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:35:12,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 108470830, now seen corresponding path program 1 times [2018-10-24 12:35:12,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:35:12,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:35:12,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:12,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:35:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:12,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:12,877 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:35:12,878 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-10-24 12:35:12,880 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [10], [13], [19], [21], [28], [31], [33], [39], [40], [41], [43] [2018-10-24 12:35:12,915 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:35:12,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:35:13,190 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:35:13,194 INFO L272 AbstractInterpreter]: Visited 14 different actions 41 times. Merged at 5 different actions 15 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-24 12:35:13,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:13,209 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:35:13,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:13,209 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 [2018-10-24 12:35:13,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:35:13,220 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:35:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:13,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:35:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:13,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:35:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:13,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:35:13,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-10-24 12:35:13,623 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:35:13,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:35:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:35:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:35:13,626 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2018-10-24 12:35:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:35:13,823 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-24 12:35:13,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:35:13,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-24 12:35:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:35:13,825 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:35:13,825 INFO L226 Difference]: Without dead ends: 22 [2018-10-24 12:35:13,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:35:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-24 12:35:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-24 12:35:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 12:35:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-24 12:35:13,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2018-10-24 12:35:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:35:13,831 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-24 12:35:13,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:35:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-24 12:35:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 12:35:13,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:35:13,832 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:35:13,832 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:35:13,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -238722856, now seen corresponding path program 2 times [2018-10-24 12:35:13,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:35:13,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:13,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:35:13,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:13,834 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:35:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:13,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:13,985 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:35:13,985 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:35:13,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:35:13,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:13,986 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 [2018-10-24 12:35:14,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:35:14,001 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:35:14,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:35:14,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:35:14,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:35:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:14,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:35:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:14,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:35:14,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-10-24 12:35:14,336 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:35:14,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:35:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:35:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:35:14,338 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2018-10-24 12:35:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:35:14,877 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-10-24 12:35:14,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 12:35:14,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-10-24 12:35:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:35:14,879 INFO L225 Difference]: With dead ends: 46 [2018-10-24 12:35:14,879 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 12:35:14,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:35:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 12:35:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-24 12:35:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 12:35:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2018-10-24 12:35:14,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2018-10-24 12:35:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:35:14,890 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2018-10-24 12:35:14,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:35:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2018-10-24 12:35:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-24 12:35:14,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:35:14,892 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:35:14,892 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:35:14,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:35:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2021299840, now seen corresponding path program 3 times [2018-10-24 12:35:14,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:35:14,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:14,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:35:14,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:35:14,894 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:35:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:35:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:15,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:15,168 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:35:15,169 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:35:15,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:35:15,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:35:15,169 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 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 [2018-10-24 12:35:15,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:35:15,177 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:35:15,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:35:15,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:35:15,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:35:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:15,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:35:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:35:16,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:35:16,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2018-10-24 12:35:16,471 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:35:16,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 12:35:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 12:35:16,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:35:16,473 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2018-10-24 12:35:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:35:16,676 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2018-10-24 12:35:16,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 12:35:16,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-24 12:35:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:35:16,678 INFO L225 Difference]: With dead ends: 38 [2018-10-24 12:35:16,678 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:35:16,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2018-10-24 12:35:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:35:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:35:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:35:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:35:16,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-10-24 12:35:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:35:16,681 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:35:16,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 12:35:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:35:16,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:35:16,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:35:16,871 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2018-10-24 12:35:16,875 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-24 12:35:16,876 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:35:16,876 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:35:16,876 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:35:16,876 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:35:16,876 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:35:16,876 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-10-24 12:35:16,876 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 16) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 16) no Hoare annotation was computed. [2018-10-24 12:35:16,877 INFO L421 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (or (and (= main_~x~0 1) (<= 0 main_~y~0) (<= (+ main_~y~0 1) main_~x~0)) (and (<= main_~y~0 main_~x~0) (<= 3 main_~y~0)) (and (<= 1 main_~x~0) (= main_~y~0 main_~x~0))) [2018-10-24 12:35:16,877 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-10-24 12:35:16,877 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:35:16,878 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:35:16,878 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:35:16,878 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:35:16,878 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:35:16,878 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:35:16,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:35:16 BoogieIcfgContainer [2018-10-24 12:35:16,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:35:16,891 INFO L168 Benchmark]: Toolchain (without parser) took 5610.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -587.0 MB). Peak memory consumption was 197.3 MB. Max. memory is 7.1 GB. [2018-10-24 12:35:16,892 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-24 12:35:16,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.52 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. [2018-10-24 12:35:16,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 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. [2018-10-24 12:35:16,895 INFO L168 Benchmark]: Boogie Preprocessor took 23.40 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. [2018-10-24 12:35:16,898 INFO L168 Benchmark]: RCFGBuilder took 434.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -834.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-24 12:35:16,899 INFO L168 Benchmark]: TraceAbstraction took 4824.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 236.4 MB). Peak memory consumption was 236.4 MB. Max. memory is 7.1 GB. [2018-10-24 12:35:16,906 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 300.52 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 23.03 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 23.40 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 434.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -834.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4824.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 236.4 MB). Peak memory consumption was 236.4 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: 13]: Loop Invariant Derived loop invariant: (((x == 1 && 0 <= y) && y + 1 <= x) || (y <= x && 3 <= y)) || (1 <= x && y == x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 5 OverallIterations, 7 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 43 SDslu, 338 SDs, 0 SdLazy, 173 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s 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, 14 PreInvPairs, 26 NumberOfFragments, 35 HoareAnnotationTreeSize, 14 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 97 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 173 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 237 ConstructedInterpolants, 12 QuantifiedInterpolants, 30961 SizeOfPredicates, 9 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 40/300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...