java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 16:46:21,266 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 16:46:21,268 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 16:46:21,283 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 16:46:21,283 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 16:46:21,284 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 16:46:21,286 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 16:46:21,288 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 16:46:21,289 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 16:46:21,290 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 16:46:21,291 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 16:46:21,291 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 16:46:21,292 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 16:46:21,293 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 16:46:21,294 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 16:46:21,295 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 16:46:21,296 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 16:46:21,298 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 16:46:21,300 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 16:46:21,301 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 16:46:21,302 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 16:46:21,310 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 16:46:21,312 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 16:46:21,312 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 16:46:21,313 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 16:46:21,313 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 16:46:21,314 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 16:46:21,315 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 16:46:21,319 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 16:46:21,320 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 16:46:21,320 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 16:46:21,321 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 16:46:21,321 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 16:46:21,322 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 16:46:21,323 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 16:46:21,324 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 16:46:21,324 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 16:46:21,356 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 16:46:21,356 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 16:46:21,360 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 16:46:21,360 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 16:46:21,360 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 16:46:21,361 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 16:46:21,361 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 16:46:21,361 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 16:46:21,361 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 16:46:21,361 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 16:46:21,361 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 16:46:21,362 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 16:46:21,362 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 16:46:21,362 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 16:46:21,363 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 16:46:21,363 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 16:46:21,363 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 16:46:21,363 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 16:46:21,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 16:46:21,364 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 16:46:21,364 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 16:46:21,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 16:46:21,364 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 16:46:21,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 16:46:21,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 16:46:21,365 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 16:46:21,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 16:46:21,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 16:46:21,365 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 16:46:21,366 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 16:46:21,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 16:46:21,366 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 16:46:21,366 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 16:46:21,366 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 16:46:21,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 16:46:21,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 16:46:21,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 16:46:21,447 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 16:46:21,447 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 16:46:21,448 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.i [2018-11-07 16:46:21,508 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ffd6785e/861096477a154d35b5f5bfafa62c4416/FLAGcf37ae158 [2018-11-07 16:46:21,943 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 16:46:21,944 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.i [2018-11-07 16:46:21,951 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ffd6785e/861096477a154d35b5f5bfafa62c4416/FLAGcf37ae158 [2018-11-07 16:46:21,965 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ffd6785e/861096477a154d35b5f5bfafa62c4416 [2018-11-07 16:46:21,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 16:46:21,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 16:46:21,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 16:46:21,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 16:46:21,981 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 16:46:21,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:21" (1/1) ... [2018-11-07 16:46:21,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f3e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:21, skipping insertion in model container [2018-11-07 16:46:21,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:21" (1/1) ... [2018-11-07 16:46:21,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 16:46:22,014 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 16:46:22,200 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:46:22,203 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 16:46:22,222 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:46:22,236 INFO L193 MainTranslator]: Completed translation [2018-11-07 16:46:22,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22 WrapperNode [2018-11-07 16:46:22,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 16:46:22,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 16:46:22,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 16:46:22,237 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 16:46:22,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 16:46:22,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 16:46:22,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 16:46:22,254 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 16:46:22,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... [2018-11-07 16:46:22,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 16:46:22,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 16:46:22,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 16:46:22,275 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 16:46:22,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 16:46:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 16:46:22,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 16:46:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 16:46:22,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 16:46:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 16:46:22,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 16:46:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 16:46:22,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 16:46:22,702 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 16:46:22,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:22 BoogieIcfgContainer [2018-11-07 16:46:22,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 16:46:22,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 16:46:22,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 16:46:22,719 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 16:46:22,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:46:21" (1/3) ... [2018-11-07 16:46:22,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca5e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:22, skipping insertion in model container [2018-11-07 16:46:22,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:22" (2/3) ... [2018-11-07 16:46:22,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca5e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:22, skipping insertion in model container [2018-11-07 16:46:22,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:22" (3/3) ... [2018-11-07 16:46:22,728 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_true-unreach-call_true-termination.c.i [2018-11-07 16:46:22,747 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 16:46:22,764 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 16:46:22,778 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 16:46:22,811 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 16:46:22,811 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 16:46:22,811 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 16:46:22,811 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 16:46:22,811 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 16:46:22,812 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 16:46:22,812 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 16:46:22,812 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 16:46:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-07 16:46:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-07 16:46:22,840 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:46:22,842 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:46:22,846 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:46:22,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash 536890419, now seen corresponding path program 1 times [2018-11-07 16:46:22,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:46:22,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:22,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:46:22,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:22,907 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:46:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:22,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:46:22,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 16:46:22,985 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:46:22,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 16:46:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 16:46:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 16:46:23,007 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-07 16:46:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:46:23,030 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-11-07 16:46:23,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 16:46:23,031 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-11-07 16:46:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:46:23,039 INFO L225 Difference]: With dead ends: 34 [2018-11-07 16:46:23,039 INFO L226 Difference]: Without dead ends: 14 [2018-11-07 16:46:23,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 16:46:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-07 16:46:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-07 16:46:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-07 16:46:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-07 16:46:23,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-07 16:46:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:46:23,080 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-07 16:46:23,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 16:46:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-07 16:46:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-07 16:46:23,081 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:46:23,082 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:46:23,082 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:46:23,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash 704732235, now seen corresponding path program 1 times [2018-11-07 16:46:23,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:46:23,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:23,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:46:23,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:23,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:46:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:23,561 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2018-11-07 16:46:23,714 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2018-11-07 16:46:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:23,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:46:23,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 16:46:24,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:46:24,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 16:46:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 16:46:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 16:46:24,002 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-11-07 16:46:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:46:24,346 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-07 16:46:24,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 16:46:24,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-07 16:46:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:46:24,348 INFO L225 Difference]: With dead ends: 22 [2018-11-07 16:46:24,348 INFO L226 Difference]: Without dead ends: 16 [2018-11-07 16:46:24,349 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 16:46:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-07 16:46:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-07 16:46:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-07 16:46:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-07 16:46:24,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-11-07 16:46:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:46:24,355 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-07 16:46:24,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 16:46:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-07 16:46:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-07 16:46:24,356 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:46:24,356 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:46:24,359 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:46:24,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash -796629243, now seen corresponding path program 1 times [2018-11-07 16:46:24,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:46:24,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:24,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:46:24,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:24,362 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:46:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:24,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:24,701 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:46:24,702 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-07 16:46:24,704 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [24], [31], [34], [36], [42], [43], [44], [46] [2018-11-07 16:46:24,735 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:46:24,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:46:24,941 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 16:46:24,943 INFO L272 AbstractInterpreter]: Visited 14 different actions 62 times. Merged at 4 different actions 24 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-07 16:46:24,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:24,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 16:46:24,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:24,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:46:24,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:46:24,982 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:46:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:25,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:46:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:25,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:46:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:25,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:46:25,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-07 16:46:25,629 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:46:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 16:46:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 16:46:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-11-07 16:46:25,631 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2018-11-07 16:46:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:46:25,785 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-07 16:46:25,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 16:46:25,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-11-07 16:46:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:46:25,787 INFO L225 Difference]: With dead ends: 24 [2018-11-07 16:46:25,788 INFO L226 Difference]: Without dead ends: 18 [2018-11-07 16:46:25,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-07 16:46:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-07 16:46:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-07 16:46:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-07 16:46:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-07 16:46:25,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-07 16:46:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:46:25,795 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-07 16:46:25,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 16:46:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-07 16:46:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-07 16:46:25,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:46:25,796 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:46:25,797 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:46:25,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -495998145, now seen corresponding path program 2 times [2018-11-07 16:46:25,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:46:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:46:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:25,799 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:46:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:26,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:26,062 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:46:26,062 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:46:26,062 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:46:26,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:26,062 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:46:26,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:46:26,080 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:46:26,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-07 16:46:26,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:46:26,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:46:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:26,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:46:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:26,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:46:26,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-07 16:46:26,491 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:46:26,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 16:46:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 16:46:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-11-07 16:46:26,492 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2018-11-07 16:46:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:46:26,707 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-07 16:46:26,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 16:46:26,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-11-07 16:46:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:46:26,708 INFO L225 Difference]: With dead ends: 30 [2018-11-07 16:46:26,708 INFO L226 Difference]: Without dead ends: 22 [2018-11-07 16:46:26,709 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-11-07 16:46:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-07 16:46:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-07 16:46:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-07 16:46:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-07 16:46:26,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-11-07 16:46:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:46:26,714 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-07 16:46:26,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 16:46:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-07 16:46:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-07 16:46:26,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:46:26,716 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:46:26,716 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:46:26,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:46:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash 209018931, now seen corresponding path program 3 times [2018-11-07 16:46:26,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:46:26,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:26,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:46:26,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:46:26,718 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:46:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:46:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 16:46:27,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:27,079 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:46:27,079 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:46:27,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:46:27,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:46:27,080 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:46:27,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 16:46:27,088 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 16:46:27,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 16:46:27,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:46:27,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:46:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:27,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:46:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:46:27,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:46:27,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2018-11-07 16:46:27,634 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:46:27,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-07 16:46:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-07 16:46:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-11-07 16:46:27,635 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-11-07 16:46:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:46:27,846 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-11-07 16:46:27,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 16:46:27,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-11-07 16:46:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:46:27,847 INFO L225 Difference]: With dead ends: 26 [2018-11-07 16:46:27,848 INFO L226 Difference]: Without dead ends: 0 [2018-11-07 16:46:27,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2018-11-07 16:46:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-07 16:46:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-07 16:46:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-07 16:46:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-07 16:46:27,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-11-07 16:46:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:46:27,851 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-07 16:46:27,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-07 16:46:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-07 16:46:27,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-07 16:46:27,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-07 16:46:27,962 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-07 16:46:27,963 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-07 16:46:27,963 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-07 16:46:27,963 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-07 16:46:27,963 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-07 16:46:27,963 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-07 16:46:27,963 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2018-11-07 16:46:27,963 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L421 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 0)) [2018-11-07 16:46:27,964 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 23) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 20) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L421 ceAbstractionStarter]: At program point L17-3(lines 17 20) the Hoare annotation is: (let ((.cse1 (+ main_~x~0 main_~j~0)) (.cse0 (+ main_~y~0 main_~i~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-11-07 16:46:27,964 INFO L425 ceAbstractionStarter]: For program point L17-4(lines 10 25) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2018-11-07 16:46:27,964 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-07 16:46:27,965 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-07 16:46:27,965 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-07 16:46:27,965 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-07 16:46:27,965 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-07 16:46:27,965 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-07 16:46:27,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:46:27 BoogieIcfgContainer [2018-11-07 16:46:27,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 16:46:27,978 INFO L168 Benchmark]: Toolchain (without parser) took 6000.89 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -479.5 MB). Peak memory consumption was 279.1 MB. Max. memory is 7.1 GB. [2018-11-07 16:46:27,980 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:46:27,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.16 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-07 16:46:27,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.12 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:46:27,982 INFO L168 Benchmark]: Boogie Preprocessor took 19.65 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:46:27,982 INFO L168 Benchmark]: RCFGBuilder took 432.31 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-11-07 16:46:27,983 INFO L168 Benchmark]: TraceAbstraction took 5269.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 319.9 MB). Peak memory consumption was 319.9 MB. Max. memory is 7.1 GB. [2018-11-07 16:46:27,989 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.16 ms. Allocated memory is still 1.6 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 17.12 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.65 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 432.31 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5269.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 319.9 MB). Peak memory consumption was 319.9 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: 17]: Loop Invariant Derived loop invariant: y + i <= x + j && x + j <= y + i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 5.1s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 28 SDslu, 247 SDs, 0 SdLazy, 204 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s 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, 27 HoareAnnotationTreeSize, 13 FomulaSimplifications, 104 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 136 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 131 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 23129 SizeOfPredicates, 21 NumberOfNonLiveVariables, 148 ConjunctsInSsa, 71 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...