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-lit/jm2006_variant_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:13:43,667 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:13:43,669 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:13:43,681 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:13:43,681 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:13:43,682 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:13:43,683 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:13:43,685 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:13:43,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:13:43,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:13:43,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:13:43,689 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:13:43,689 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:13:43,690 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:13:43,691 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:13:43,692 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:13:43,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:13:43,695 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:13:43,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:13:43,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:13:43,699 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:13:43,700 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:13:43,707 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:13:43,707 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:13:43,707 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:13:43,710 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:13:43,711 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:13:43,712 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:13:43,716 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:13:43,717 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:13:43,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:13:43,719 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 04:13:43,719 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 04:13:43,720 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 04:13:43,720 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 04:13:43,721 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 04:13:43,721 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 [2018-10-27 04:13:43,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:13:43,752 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:13:43,753 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:13:43,753 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:13:43,753 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:13:43,756 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:13:43,756 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:13:43,756 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:13:43,756 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 04:13:43,756 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:13:43,757 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:13:43,757 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:13:43,758 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:13:43,758 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:13:43,758 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:13:43,758 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 04:13:43,758 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:13:43,759 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 04:13:43,760 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 04:13:43,761 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 04:13:43,761 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:13:43,761 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:13:43,761 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:13:43,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:13:43,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:13:43,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:13:43,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:13:43,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 04:13:43,763 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 04:13:43,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:13:43,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:13:43,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:13:43,832 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:13:43,833 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:13:43,833 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-27 04:13:43,893 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03e7883ec/b67616bb683e43e2af336a9dcae8621b/FLAGfd093c509 [2018-10-27 04:13:44,369 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:13:44,370 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-27 04:13:44,376 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03e7883ec/b67616bb683e43e2af336a9dcae8621b/FLAGfd093c509 [2018-10-27 04:13:44,388 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03e7883ec/b67616bb683e43e2af336a9dcae8621b [2018-10-27 04:13:44,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:13:44,401 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 04:13:44,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:13:44,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:13:44,405 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:13:44,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdeee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44, skipping insertion in model container [2018-10-27 04:13:44,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:13:44,435 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:13:44,598 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:13:44,602 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:13:44,621 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:13:44,637 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:13:44,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44 WrapperNode [2018-10-27 04:13:44,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:13:44,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:13:44,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:13:44,639 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:13:44,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:13:44,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:13:44,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:13:44,662 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:13:44,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... [2018-10-27 04:13:44,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:13:44,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:13:44,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:13:44,686 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:13:44,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:13:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:13:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:13:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:13:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:13:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:13:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:13:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 04:13:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 04:13:45,232 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:13:45,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:45 BoogieIcfgContainer [2018-10-27 04:13:45,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:13:45,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:13:45,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:13:45,237 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:13:45,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:13:44" (1/3) ... [2018-10-27 04:13:45,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b145cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:45, skipping insertion in model container [2018-10-27 04:13:45,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:44" (2/3) ... [2018-10-27 04:13:45,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b145cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:45, skipping insertion in model container [2018-10-27 04:13:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:45" (3/3) ... [2018-10-27 04:13:45,241 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-27 04:13:45,252 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:13:45,260 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 04:13:45,278 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 04:13:45,312 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:13:45,312 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 04:13:45,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:13:45,313 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:13:45,313 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:13:45,313 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:13:45,313 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:13:45,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:13:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-27 04:13:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 04:13:45,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:45,342 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:45,344 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:45,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash 380045771, now seen corresponding path program 1 times [2018-10-27 04:13:45,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:45,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:45,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:45,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:45,405 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:45,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:13:45,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:13:45,480 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:45,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 04:13:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 04:13:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:13:45,503 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-27 04:13:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:45,525 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2018-10-27 04:13:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 04:13:45,526 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-10-27 04:13:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:45,535 INFO L225 Difference]: With dead ends: 35 [2018-10-27 04:13:45,535 INFO L226 Difference]: Without dead ends: 15 [2018-10-27 04:13:45,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:13:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-27 04:13:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-27 04:13:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-27 04:13:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-27 04:13:45,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-27 04:13:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:45,579 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-27 04:13:45,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 04:13:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-27 04:13:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-27 04:13:45,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:45,580 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:45,580 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:45,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 137515447, now seen corresponding path program 1 times [2018-10-27 04:13:45,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:45,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:45,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:45,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:45,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:45,978 WARN L179 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-10-27 04:13:46,364 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-10-27 04:13:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:46,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:13:46,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-27 04:13:46,444 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:46,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 04:13:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 04:13:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:13:46,446 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2018-10-27 04:13:46,687 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-27 04:13:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:46,852 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-27 04:13:46,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 04:13:46,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-27 04:13:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:46,855 INFO L225 Difference]: With dead ends: 23 [2018-10-27 04:13:46,855 INFO L226 Difference]: Without dead ends: 17 [2018-10-27 04:13:46,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:13:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-27 04:13:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-27 04:13:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 04:13:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-27 04:13:46,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-27 04:13:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:46,869 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-27 04:13:46,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 04:13:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-27 04:13:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 04:13:46,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:46,871 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:46,872 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:46,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -431115791, now seen corresponding path program 1 times [2018-10-27 04:13:46,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:46,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:46,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:46,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:46,875 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:47,299 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-10-27 04:13:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:47,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:47,502 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:13:47,503 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-27 04:13:47,505 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [20], [22], [28], [35], [38], [40], [46], [47], [48], [50] [2018-10-27 04:13:47,558 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:13:47,558 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:13:48,064 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:13:48,066 INFO L272 AbstractInterpreter]: Visited 15 different actions 133 times. Merged at 4 different actions 60 times. Widened at 1 different actions 11 times. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-10-27 04:13:48,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:48,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:13:48,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:48,112 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:13:48,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:48,126 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:13:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:48,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:13:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:48,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:13:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:48,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:13:48,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2018-10-27 04:13:48,615 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:13:48,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 04:13:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 04:13:48,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-10-27 04:13:48,617 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2018-10-27 04:13:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:48,848 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-27 04:13:48,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 04:13:48,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-10-27 04:13:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:48,850 INFO L225 Difference]: With dead ends: 25 [2018-10-27 04:13:48,851 INFO L226 Difference]: Without dead ends: 19 [2018-10-27 04:13:48,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-10-27 04:13:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-27 04:13:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-27 04:13:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-27 04:13:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-27 04:13:48,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-27 04:13:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:48,857 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-27 04:13:48,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 04:13:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-27 04:13:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-27 04:13:48,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:48,859 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:48,859 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:48,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1424888917, now seen corresponding path program 2 times [2018-10-27 04:13:48,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:48,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:48,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:48,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:48,861 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:49,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:49,143 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:13:49,143 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:13:49,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:13:49,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:49,144 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:13:49,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:13:49,157 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:13:49,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 04:13:49,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:13:49,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:13:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:49,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:13:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:49,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:13:49,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-10-27 04:13:49,523 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:13:49,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 04:13:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 04:13:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-10-27 04:13:49,524 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2018-10-27 04:13:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:49,749 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-27 04:13:49,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 04:13:49,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-10-27 04:13:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:49,751 INFO L225 Difference]: With dead ends: 31 [2018-10-27 04:13:49,752 INFO L226 Difference]: Without dead ends: 23 [2018-10-27 04:13:49,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-10-27 04:13:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-27 04:13:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-27 04:13:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-27 04:13:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-27 04:13:49,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-27 04:13:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:49,759 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-27 04:13:49,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 04:13:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-27 04:13:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-27 04:13:49,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:49,760 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:49,760 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:49,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1072393119, now seen corresponding path program 3 times [2018-10-27 04:13:49,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:49,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:49,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:13:49,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:49,762 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 04:13:50,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:50,179 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:13:50,179 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:13:50,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:13:50,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:50,180 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 [2018-10-27 04:13:50,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 04:13:50,189 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 04:13:50,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 04:13:50,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:13:50,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:13:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:50,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:13:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:50,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:13:50,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2018-10-27 04:13:50,697 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:13:50,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 04:13:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 04:13:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2018-10-27 04:13:50,698 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2018-10-27 04:13:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:50,919 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-27 04:13:50,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 04:13:50,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-10-27 04:13:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:50,921 INFO L225 Difference]: With dead ends: 27 [2018-10-27 04:13:50,921 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 04:13:50,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2018-10-27 04:13:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 04:13:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 04:13:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 04:13:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 04:13:50,925 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-10-27 04:13:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:50,925 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 04:13:50,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 04:13:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 04:13:50,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 04:13:50,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 04:13:51,059 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 04:13:51,059 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 04:13:51,059 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 04:13:51,059 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 04:13:51,060 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 04:13:51,060 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 04:13:51,060 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 main_~z~0))) (and (<= .cse0 0) (<= 0 .cse0))) [2018-10-27 04:13:51,060 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-10-27 04:13:51,060 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 23) no Hoare annotation was computed. [2018-10-27 04:13:51,060 INFO L421 ceAbstractionStarter]: At program point L19-3(lines 19 23) the Hoare annotation is: (let ((.cse1 (+ main_~i~0 main_~y~0 main_~z~0)) (.cse0 (+ main_~x~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point L19-4(lines 10 28) no Hoare annotation was computed. [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-10-27 04:13:51,061 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-27 04:13:51,061 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-27 04:13:51,061 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-27 04:13:51,062 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-27 04:13:51,062 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-27 04:13:51,062 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-27 04:13:51,062 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-27 04:13:51,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:13:51 BoogieIcfgContainer [2018-10-27 04:13:51,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:13:51,075 INFO L168 Benchmark]: Toolchain (without parser) took 6675.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -354.4 MB). Peak memory consumption was 367.1 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:51,076 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:13:51,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:51,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:13:51,078 INFO L168 Benchmark]: Boogie Preprocessor took 24.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:13:51,079 INFO L168 Benchmark]: RCFGBuilder took 547.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -768.7 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:51,080 INFO L168 Benchmark]: TraceAbstraction took 5839.98 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 403.8 MB). Peak memory consumption was 403.8 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:51,085 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 236.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.30 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 547.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -768.7 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5839.98 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 403.8 MB). Peak memory consumption was 403.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x + j <= i + y + z && i + y + z <= x + j - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 5.7s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 25 SDslu, 309 SDs, 0 SdLazy, 266 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 33 HoareAnnotationTreeSize, 13 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 192 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 139 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 28213 SizeOfPredicates, 21 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 2/84 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...