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.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 10:00:19,619 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 10:00:19,623 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 10:00:19,639 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 10:00:19,640 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 10:00:19,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 10:00:19,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 10:00:19,644 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 10:00:19,646 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 10:00:19,647 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 10:00:19,648 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 10:00:19,648 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 10:00:19,649 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 10:00:19,650 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 10:00:19,651 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 10:00:19,653 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 10:00:19,655 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 10:00:19,662 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 10:00:19,664 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 10:00:19,667 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 10:00:19,669 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 10:00:19,672 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 10:00:19,675 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 10:00:19,675 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 10:00:19,676 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 10:00:19,677 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 10:00:19,678 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 10:00:19,679 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 10:00:19,679 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 10:00:19,683 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 10:00:19,684 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 10:00:19,685 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 10:00:19,689 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 10:00:19,720 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 10:00:19,720 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 10:00:19,721 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 10:00:19,722 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 10:00:19,723 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 10:00:19,723 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 10:00:19,723 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 10:00:19,723 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 10:00:19,723 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 10:00:19,724 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 10:00:19,724 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 10:00:19,724 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 10:00:19,725 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 10:00:19,726 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 10:00:19,726 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 10:00:19,726 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 10:00:19,726 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 10:00:19,726 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 10:00:19,727 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 10:00:19,727 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 10:00:19,727 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 10:00:19,727 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 10:00:19,728 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 10:00:19,729 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 10:00:19,729 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:00:19,730 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 10:00:19,730 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 10:00:19,730 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 10:00:19,730 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 10:00:19,730 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 10:00:19,731 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 10:00:19,731 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 10:00:19,731 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 10:00:19,731 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 10:00:19,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 10:00:19,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 10:00:19,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 10:00:19,819 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 10:00:19,819 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 10:00:19,820 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-23 10:00:19,884 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ec191ef63/8714b991ab16436182b1554a9228ae57/FLAG39cb9d47d [2018-10-23 10:00:20,340 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 10:00:20,341 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-23 10:00:20,348 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ec191ef63/8714b991ab16436182b1554a9228ae57/FLAG39cb9d47d [2018-10-23 10:00:20,363 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ec191ef63/8714b991ab16436182b1554a9228ae57 [2018-10-23 10:00:20,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 10:00:20,377 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 10:00:20,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 10:00:20,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 10:00:20,381 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 10:00:20,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee99eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20, skipping insertion in model container [2018-10-23 10:00:20,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 10:00:20,415 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 10:00:20,574 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:00:20,578 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 10:00:20,595 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:00:20,611 INFO L193 MainTranslator]: Completed translation [2018-10-23 10:00:20,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20 WrapperNode [2018-10-23 10:00:20,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 10:00:20,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 10:00:20,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 10:00:20,613 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 10:00:20,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 10:00:20,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 10:00:20,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 10:00:20,637 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 10:00:20,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (1/1) ... [2018-10-23 10:00:20,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 10:00:20,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 10:00:20,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 10:00:20,659 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 10:00:20,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (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 [2018-10-23 10:00:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 10:00:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 10:00:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 10:00:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 10:00:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 10:00:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 10:00:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 10:00:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 10:00:21,082 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 10:00:21,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:21 BoogieIcfgContainer [2018-10-23 10:00:21,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 10:00:21,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 10:00:21,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 10:00:21,088 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 10:00:21,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:00:20" (1/3) ... [2018-10-23 10:00:21,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d183718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:21, skipping insertion in model container [2018-10-23 10:00:21,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:20" (2/3) ... [2018-10-23 10:00:21,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d183718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:21, skipping insertion in model container [2018-10-23 10:00:21,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:21" (3/3) ... [2018-10-23 10:00:21,093 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call2_true-termination.i [2018-10-23 10:00:21,102 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 10:00:21,109 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 10:00:21,126 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 10:00:21,162 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 10:00:21,163 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 10:00:21,163 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 10:00:21,163 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 10:00:21,163 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 10:00:21,163 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 10:00:21,164 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 10:00:21,164 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 10:00:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-23 10:00:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 10:00:21,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:21,197 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:21,199 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:21,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-23 10:00:21,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:21,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:21,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:21,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:00:21,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 10:00:21,319 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:00:21,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 10:00:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 10:00:21,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:00:21,338 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-23 10:00:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:21,359 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-23 10:00:21,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 10:00:21,360 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-23 10:00:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:21,369 INFO L225 Difference]: With dead ends: 29 [2018-10-23 10:00:21,369 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 10:00:21,373 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 [2018-10-23 10:00:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 10:00:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-23 10:00:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-23 10:00:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-23 10:00:21,409 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-23 10:00:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:21,409 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-23 10:00:21,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 10:00:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-23 10:00:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 10:00:21,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:21,411 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:21,412 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:21,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-23 10:00:21,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:21,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:21,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,415 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:21,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:00:21,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 10:00:21,577 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:00:21,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 10:00:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 10:00:21,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 10:00:21,580 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-23 10:00:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:21,629 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-23 10:00:21,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 10:00:21,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-23 10:00:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:21,631 INFO L225 Difference]: With dead ends: 19 [2018-10-23 10:00:21,632 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 10:00:21,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 10:00:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 10:00:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 10:00:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 10:00:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 10:00:21,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-23 10:00:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:21,638 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 10:00:21,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 10:00:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 10:00:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 10:00:21,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:21,639 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:21,642 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:21,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-23 10:00:21,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:21,647 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:21,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:21,795 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:21,797 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-23 10:00:21,801 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-23 10:00:21,847 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 10:00:21,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 10:00:21,974 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 10:00:22,233 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 10:00:22,235 INFO L272 AbstractInterpreter]: Visited 12 different actions 67 times. Merged at 3 different actions 25 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-23 10:00:22,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:22,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 10:00:22,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:22,253 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 [2018-10-23 10:00:22,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:22,264 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:00:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:22,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:22,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:22,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:22,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 9 [2018-10-23 10:00:22,635 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:22,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 10:00:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 10:00:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-10-23 10:00:22,636 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-23 10:00:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:22,661 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-23 10:00:22,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 10:00:22,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-23 10:00:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:22,662 INFO L225 Difference]: With dead ends: 21 [2018-10-23 10:00:22,663 INFO L226 Difference]: Without dead ends: 16 [2018-10-23 10:00:22,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-10-23 10:00:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-23 10:00:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-23 10:00:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-23 10:00:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-23 10:00:22,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-23 10:00:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:22,670 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-23 10:00:22,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 10:00:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-23 10:00:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 10:00:22,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:22,671 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:22,672 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:22,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-23 10:00:22,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:22,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:22,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:22,674 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:22,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:22,948 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:22,948 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:22,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:22,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:22,949 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 [2018-10-23 10:00:22,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:00:22,959 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:00:22,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:00:22,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:22,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:23,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:23,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:23,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 11 [2018-10-23 10:00:23,298 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:23,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 10:00:23,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 10:00:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-23 10:00:23,301 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-23 10:00:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:23,400 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-23 10:00:23,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 10:00:23,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-23 10:00:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:23,402 INFO L225 Difference]: With dead ends: 23 [2018-10-23 10:00:23,402 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 10:00:23,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-23 10:00:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 10:00:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-23 10:00:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 10:00:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-23 10:00:23,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-23 10:00:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:23,408 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-23 10:00:23,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 10:00:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-23 10:00:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-23 10:00:23,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:23,409 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:23,409 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:23,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-10-23 10:00:23,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:23,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:23,412 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:23,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:23,614 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:23,614 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:23,614 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:23,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:23,614 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 [2018-10-23 10:00:23,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:00:23,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:00:23,641 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:00:23,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:23,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:23,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:24,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:24,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9] total 13 [2018-10-23 10:00:24,309 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:24,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 10:00:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 10:00:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-10-23 10:00:24,311 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-23 10:00:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:24,350 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 10:00:24,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 10:00:24,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-23 10:00:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:24,353 INFO L225 Difference]: With dead ends: 25 [2018-10-23 10:00:24,353 INFO L226 Difference]: Without dead ends: 20 [2018-10-23 10:00:24,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-10-23 10:00:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-23 10:00:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-23 10:00:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 10:00:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 10:00:24,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-23 10:00:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:24,359 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 10:00:24,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 10:00:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 10:00:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 10:00:24,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:24,360 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:24,360 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:24,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -873685328, now seen corresponding path program 4 times [2018-10-23 10:00:24,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:24,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:24,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,362 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:24,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:24,506 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:24,507 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:24,507 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:24,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:24,507 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:24,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:24,515 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:00:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:24,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:24,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:24,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:24,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 15 [2018-10-23 10:00:24,830 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:24,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 10:00:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 10:00:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-10-23 10:00:24,832 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-23 10:00:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:24,900 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-23 10:00:24,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 10:00:24,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-23 10:00:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:24,902 INFO L225 Difference]: With dead ends: 27 [2018-10-23 10:00:24,903 INFO L226 Difference]: Without dead ends: 22 [2018-10-23 10:00:24,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-10-23 10:00:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-23 10:00:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-23 10:00:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 10:00:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-23 10:00:24,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-23 10:00:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:24,909 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-23 10:00:24,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 10:00:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-23 10:00:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 10:00:24,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:24,910 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:24,910 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:24,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1097991946, now seen corresponding path program 5 times [2018-10-23 10:00:24,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:24,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:24,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:25,107 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:25,107 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:25,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:25,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:25,107 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:25,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:00:25,117 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:00:25,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:00:25,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:25,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:25,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2018-10-23 10:00:25,439 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:25,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 10:00:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 10:00:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-10-23 10:00:25,440 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-10-23 10:00:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:25,504 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-23 10:00:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 10:00:25,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-23 10:00:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:25,506 INFO L225 Difference]: With dead ends: 29 [2018-10-23 10:00:25,506 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 10:00:25,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-10-23 10:00:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 10:00:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-23 10:00:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-23 10:00:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-23 10:00:25,511 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-23 10:00:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-23 10:00:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 10:00:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-23 10:00:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 10:00:25,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:25,513 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:25,513 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:25,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1908287044, now seen corresponding path program 6 times [2018-10-23 10:00:25,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:25,770 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-23 10:00:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-23 10:00:25,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:00:25,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 10:00:25,788 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:00:25,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 10:00:25,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 10:00:25,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-23 10:00:25,789 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2018-10-23 10:00:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:25,817 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-23 10:00:25,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 10:00:25,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-10-23 10:00:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:25,818 INFO L225 Difference]: With dead ends: 24 [2018-10-23 10:00:25,818 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 10:00:25,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 10:00:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 10:00:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 10:00:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 10:00:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 10:00:25,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-10-23 10:00:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:25,821 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 10:00:25,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 10:00:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 10:00:25,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 10:00:25,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 10:00:25,880 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-23 10:00:25,880 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-23 10:00:25,880 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-23 10:00:25,881 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-23 10:00:25,881 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-23 10:00:25,881 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-23 10:00:25,881 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-23 10:00:25,881 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-23 10:00:25,881 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-23 10:00:25,882 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-23 10:00:25,882 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 1)) 4294967296)) 6))) [2018-10-23 10:00:25,882 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (let ((.cse0 (+ (* 4294967296 (div main_~x~0 4294967296)) 6))) (and (<= .cse0 main_~x~0) (<= main_~x~0 .cse0))) [2018-10-23 10:00:25,882 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-23 10:00:25,882 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-23 10:00:25,882 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-23 10:00:25,883 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-23 10:00:25,883 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-23 10:00:25,883 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-23 10:00:25,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:00:25 BoogieIcfgContainer [2018-10-23 10:00:25,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 10:00:25,896 INFO L168 Benchmark]: Toolchain (without parser) took 5520.83 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -562.0 MB). Peak memory consumption was 232.3 MB. Max. memory is 7.1 GB. [2018-10-23 10:00:25,898 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-23 10:00:25,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.68 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. [2018-10-23 10:00:25,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.54 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. [2018-10-23 10:00:25,900 INFO L168 Benchmark]: Boogie Preprocessor took 22.00 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. [2018-10-23 10:00:25,900 INFO L168 Benchmark]: RCFGBuilder took 424.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -843.6 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-10-23 10:00:25,901 INFO L168 Benchmark]: TraceAbstraction took 4811.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 271.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 7.1 GB. [2018-10-23 10:00:25,906 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 234.68 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 23.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.00 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 424.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -843.6 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4811.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 271.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 7.1 GB. * 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 Derived loop invariant: (x <= 0 && 0 <= x) || x <= 4294967296 * ((x + -1) / 4294967296) + 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 108 SDtfs, 2 SDslu, 263 SDs, 0 SdLazy, 144 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 136 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 43 HoareAnnotationTreeSize, 14 FomulaSimplifications, 90 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 281 ConstructedInterpolants, 0 QuantifiedInterpolants, 23509 SizeOfPredicates, 0 NumberOfNonLiveVariables, 215 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 42/252 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...