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/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:43:23,808 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:43:23,810 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:43:23,824 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:43:23,824 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:43:23,827 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:43:23,828 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:43:23,832 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:43:23,834 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:43:23,835 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:43:23,835 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:43:23,839 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:43:23,840 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:43:23,841 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:43:23,843 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:43:23,843 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:43:23,844 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:43:23,846 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:43:23,848 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:43:23,849 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:43:23,850 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:43:23,852 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:43:23,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:43:23,869 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:43:23,900 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:43:23,901 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:43:23,902 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:43:23,902 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:43:23,903 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:43:23,903 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:43:23,903 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:43:23,904 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:43:23,904 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:43:23,904 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:43:23,904 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:43:23,904 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:43:23,905 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:43:23,905 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:43:23,905 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:43:23,905 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:43:23,905 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:43:23,906 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:43:23,906 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:43:23,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:43:23,906 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:43:23,906 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:43:23,906 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:43:23,907 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:43:23,907 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:43:23,907 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:43:23,907 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:43:23,907 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:43:23,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:43:23,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:43:23,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:43:23,994 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:43:23,995 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:43:23,995 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-11-06 22:43:24,059 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ffa2cdc/5902daf9e8414e13a46e7054dd6510fb/FLAGffca55a1a [2018-11-06 22:43:24,464 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:43:24,465 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-11-06 22:43:24,471 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ffa2cdc/5902daf9e8414e13a46e7054dd6510fb/FLAGffca55a1a [2018-11-06 22:43:24,484 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ffa2cdc/5902daf9e8414e13a46e7054dd6510fb [2018-11-06 22:43:24,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:43:24,495 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:43:24,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:24,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:43:24,499 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:43:24,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41600c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24, skipping insertion in model container [2018-11-06 22:43:24,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:43:24,534 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:43:24,749 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:24,753 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:43:24,771 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:24,787 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:43:24,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24 WrapperNode [2018-11-06 22:43:24,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:24,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:24,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:43:24,789 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:43:24,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:24,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:43:24,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:43:24,818 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:43:24,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (1/1) ... [2018-11-06 22:43:24,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:43:24,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:43:24,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:43:24,835 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:43:24,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (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 [2018-11-06 22:43:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:43:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:43:25,146 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:43:25,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:25 BoogieIcfgContainer [2018-11-06 22:43:25,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:43:25,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:43:25,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:43:25,151 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:43:25,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:24" (1/3) ... [2018-11-06 22:43:25,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6533caf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:25, skipping insertion in model container [2018-11-06 22:43:25,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:24" (2/3) ... [2018-11-06 22:43:25,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6533caf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:25, skipping insertion in model container [2018-11-06 22:43:25,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:25" (3/3) ... [2018-11-06 22:43:25,154 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call1_true-termination.i [2018-11-06 22:43:25,164 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:43:25,172 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:43:25,188 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:43:25,222 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:43:25,223 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:43:25,223 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:43:25,223 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:43:25,223 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:43:25,223 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:43:25,223 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:43:25,224 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:43:25,224 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:43:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-11-06 22:43:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:43:25,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:25,244 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:43:25,247 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:25,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-11-06 22:43:25,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:25,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:25,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:25,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:25,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:25,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:43:25,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:43:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:43:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:43:25,373 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-11-06 22:43:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:25,387 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-11-06 22:43:25,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:43:25,389 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:43:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:25,399 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:43:25,399 INFO L226 Difference]: Without dead ends: 8 [2018-11-06 22:43:25,403 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 [2018-11-06 22:43:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-11-06 22:43:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-11-06 22:43:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-06 22:43:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-11-06 22:43:25,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-11-06 22:43:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:25,439 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-11-06 22:43:25,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:43:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-11-06 22:43:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:43:25,440 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:25,440 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:25,441 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:25,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-11-06 22:43:25,441 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:25,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:25,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:25,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:25,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:25,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:43:25,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:43:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:43:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:43:25,618 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-11-06 22:43:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:25,675 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-11-06 22:43:25,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:43:25,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:43:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:25,678 INFO L225 Difference]: With dead ends: 14 [2018-11-06 22:43:25,678 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:43:25,680 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:43:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:43:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:43:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:43:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-11-06 22:43:25,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-11-06 22:43:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:25,686 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-11-06 22:43:25,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:43:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-11-06 22:43:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:43:25,687 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:25,687 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:25,687 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:25,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-11-06 22:43:25,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:25,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:25,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:25,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:25,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:25,883 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-11-06 22:43:25,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:25,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:25,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:25,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:43:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:43:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:43:25,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:43:25,978 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-11-06 22:43:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:26,019 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:43:26,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:43:26,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-11-06 22:43:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:26,021 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:43:26,021 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:43:26,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:43:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:43:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:43:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:43:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:43:26,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-11-06 22:43:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:26,027 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:43:26,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:43:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:43:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:43:26,028 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:26,028 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:26,028 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:26,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-11-06 22:43:26,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:26,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:26,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:26,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:26,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:26,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-11-06 22:43:26,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:26,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:26,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:26,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:26,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:26,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:43:26,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:43:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:43:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:26,257 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-06 22:43:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:26,320 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-06 22:43:26,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:43:26,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-06 22:43:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:26,322 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:43:26,322 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:43:26,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:43:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:43:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:43:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:43:26,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-06 22:43:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:26,326 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:43:26,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:43:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:43:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:43:26,327 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:26,327 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:26,328 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:26,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-11-06 22:43:26,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:26,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:26,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:26,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:26,699 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-11-06 22:43:26,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:26,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:43:26,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:26,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:26,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:26,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:43:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:43:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:43:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:26,790 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-06 22:43:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:26,840 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-06 22:43:26,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:43:26,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-06 22:43:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:26,842 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:43:26,842 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:43:26,843 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:43:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:43:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:43:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-06 22:43:26,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-11-06 22:43:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:26,847 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-06 22:43:26,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:43:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-06 22:43:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:43:26,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:26,848 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:26,849 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:26,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-11-06 22:43:26,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:26,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:27,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:27,005 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:27,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:27,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:27,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:27,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:27,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:27,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:43:27,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:43:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:43:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:27,071 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-11-06 22:43:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:27,213 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:43:27,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:43:27,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-06 22:43:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:27,215 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:43:27,216 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:43:27,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:43:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:43:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:43:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:43:27,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-06 22:43:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:27,220 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:43:27,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:43:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:43:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:43:27,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:27,222 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:27,222 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:27,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:27,222 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-11-06 22:43:27,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:27,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:27,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:27,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:27,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:27,398 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:27,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:27,441 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:43:27,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:27,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:27,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:27,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:43:27,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:43:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:43:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:27,489 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-11-06 22:43:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:27,627 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-06 22:43:27,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:43:27,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-11-06 22:43:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:27,628 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:43:27,628 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:43:27,629 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:43:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-06 22:43:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:43:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:43:27,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-11-06 22:43:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:27,634 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:43:27,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:43:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:43:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:43:27,635 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:27,635 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:27,641 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:27,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-11-06 22:43:27,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:27,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:27,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:27,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-06 22:43:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-06 22:43:27,725 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-06 22:43:27,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:43:27 BoogieIcfgContainer [2018-11-06 22:43:27,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:43:27,751 INFO L168 Benchmark]: Toolchain (without parser) took 3257.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -627.5 MB). Peak memory consumption was 110.2 MB. Max. memory is 7.1 GB. [2018-11-06 22:43:27,754 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:43:27,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.13 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. [2018-11-06 22:43:27,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.73 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. [2018-11-06 22:43:27,756 INFO L168 Benchmark]: Boogie Preprocessor took 16.70 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. [2018-11-06 22:43:27,757 INFO L168 Benchmark]: RCFGBuilder took 311.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-11-06 22:43:27,758 INFO L168 Benchmark]: TraceAbstraction took 2602.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 152.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. [2018-11-06 22:43:27,766 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.13 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 28.73 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 16.70 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 311.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2602.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 152.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND FALSE !(x < 6) [L15] CALL __VERIFIER_assert(y != 64) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. UNSAFE Result, 2.5s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 0 SDslu, 155 SDs, 0 SdLazy, 133 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 7893 SizeOfPredicates, 5 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...