java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:33:51,129 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:33:51,131 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:33:51,143 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:33:51,143 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:33:51,144 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:33:51,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:33:51,147 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:33:51,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:33:51,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:33:51,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:33:51,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:33:51,151 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:33:51,152 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:33:51,153 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:33:51,154 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:33:51,155 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:33:51,156 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:33:51,158 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:33:51,160 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:33:51,161 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:33:51,162 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:33:51,164 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 23:33:51,164 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 23:33:51,166 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 23:33:51,167 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 23:33:51,168 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 23:33:51,169 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 23:33:51,171 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 23:33:51,172 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 23:33:51,174 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 23:33:51,174 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 23:33:51,178 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 [2018-07-23 23:33:51,204 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:33:51,204 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:33:51,205 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:33:51,205 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:33:51,206 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:33:51,207 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:33:51,207 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:33:51,207 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:33:51,208 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:33:51,209 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:33:51,209 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:33:51,209 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:33:51,210 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:33:51,210 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:33:51,211 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:33:51,211 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:33:51,211 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:33:51,211 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:33:51,212 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:33:51,212 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:33:51,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:33:51,212 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:33:51,212 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:33:51,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:33:51,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:33:51,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:33:51,292 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:33:51,292 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:33:51,293 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-07-23 23:33:51,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b6ad5a9/e56e288846e04438befb42b002e02936/FLAG296d74b81 [2018-07-23 23:33:51,747 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:33:51,747 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-07-23 23:33:51,753 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b6ad5a9/e56e288846e04438befb42b002e02936/FLAG296d74b81 [2018-07-23 23:33:51,768 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b6ad5a9/e56e288846e04438befb42b002e02936 [2018-07-23 23:33:51,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:33:51,779 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:33:51,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:33:51,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:33:51,787 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:33:51,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:33:51" (1/1) ... [2018-07-23 23:33:51,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3796f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:51, skipping insertion in model container [2018-07-23 23:33:51,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:33:51" (1/1) ... [2018-07-23 23:33:51,970 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:33:52,005 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:33:52,021 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:33:52,025 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:33:52,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52 WrapperNode [2018-07-23 23:33:52,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:33:52,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:33:52,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:33:52,039 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:33:52,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:33:52,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:33:52,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:33:52,071 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:33:52,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (1/1) ... [2018-07-23 23:33:52,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:33:52,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:33:52,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:33:52,094 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:33:52,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (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 [2018-07-23 23:33:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:33:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:33:52,462 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:33:52,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:33:52 BoogieIcfgContainer [2018-07-23 23:33:52,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:33:52,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:33:52,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:33:52,467 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:33:52,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:33:51" (1/3) ... [2018-07-23 23:33:52,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f25a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:33:52, skipping insertion in model container [2018-07-23 23:33:52,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:33:52" (2/3) ... [2018-07-23 23:33:52,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f25a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:33:52, skipping insertion in model container [2018-07-23 23:33:52,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:33:52" (3/3) ... [2018-07-23 23:33:52,476 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call2_true-termination.i [2018-07-23 23:33:52,484 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:33:52,491 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:33:52,533 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:33:52,534 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:33:52,534 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:33:52,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:33:52,535 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:33:52,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:33:52,535 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:33:52,535 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:33:52,535 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:33:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-07-23 23:33:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 23:33:52,559 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:52,560 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 23:33:52,560 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-07-23 23:33:52,567 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:52,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:52,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:52,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:52,668 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:33:52,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:33:52,672 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:33:52,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:33:52,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:33:52,687 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-07-23 23:33:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:52,703 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-07-23 23:33:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:33:52,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-23 23:33:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:52,714 INFO L225 Difference]: With dead ends: 20 [2018-07-23 23:33:52,715 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 23:33:52,718 INFO L573 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 [2018-07-23 23:33:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 23:33:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 23:33:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 23:33:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 23:33:52,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 23:33:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:52,754 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 23:33:52,755 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:33:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 23:33:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 23:33:52,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:52,756 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:52,756 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-07-23 23:33:52,756 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:52,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:52,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:52,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:52,882 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:33:52,883 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:33:52,884 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:33:52,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:33:52,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:33:52,886 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-07-23 23:33:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:52,948 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 23:33:52,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:33:52,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-23 23:33:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:52,950 INFO L225 Difference]: With dead ends: 14 [2018-07-23 23:33:52,950 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 23:33:52,951 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:33:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 23:33:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 23:33:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 23:33:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 23:33:52,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-07-23 23:33:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:52,955 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 23:33:52,955 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:33:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 23:33:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 23:33:52,956 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:52,956 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:52,956 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-07-23 23:33:52,957 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:52,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:52,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:52,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,098 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:53,098 INFO L221 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 [2018-07-23 23:33:53,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:53,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,190 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:53,190 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-23 23:33:53,190 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:33:53,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:33:53,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:33:53,191 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-07-23 23:33:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:53,238 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 23:33:53,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:33:53,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-07-23 23:33:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:53,239 INFO L225 Difference]: With dead ends: 16 [2018-07-23 23:33:53,239 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 23:33:53,240 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:33:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 23:33:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 23:33:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 23:33:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 23:33:53,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-07-23 23:33:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:53,245 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 23:33:53,245 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:33:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 23:33:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 23:33:53,247 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:53,247 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:53,247 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:53,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-07-23 23:33:53,247 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:53,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:53,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:53,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:53,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,370 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:53,370 INFO L221 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 [2018-07-23 23:33:53,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:33:53,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:33:53,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:53,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:53,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-23 23:33:53,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:33:53,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:33:53,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:33:53,485 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-07-23 23:33:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:53,607 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 23:33:53,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:33:53,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-23 23:33:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:53,609 INFO L225 Difference]: With dead ends: 18 [2018-07-23 23:33:53,610 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 23:33:53,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:33:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 23:33:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 23:33:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 23:33:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 23:33:53,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-23 23:33:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:53,615 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 23:33:53,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:33:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 23:33:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 23:33:53,616 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:53,616 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:53,616 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-07-23 23:33:53,617 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:53,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:53,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:53,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:53,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,926 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:53,926 INFO L221 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 [2018-07-23 23:33:53,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:33:53,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:33:53,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:53,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:54,022 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:54,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-23 23:33:54,023 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:33:54,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:33:54,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:33:54,024 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-07-23 23:33:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:54,077 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 23:33:54,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:33:54,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-07-23 23:33:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:54,079 INFO L225 Difference]: With dead ends: 20 [2018-07-23 23:33:54,079 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 23:33:54,080 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:33:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 23:33:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 23:33:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 23:33:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 23:33:54,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-23 23:33:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:54,084 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 23:33:54,084 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:33:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 23:33:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 23:33:54,085 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:54,085 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:54,085 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:54,086 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-07-23 23:33:54,086 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:54,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:54,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:54,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:54,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:54,226 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:54,226 INFO L221 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 [2018-07-23 23:33:54,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:33:54,278 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:33:54,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:54,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:54,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:54,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-23 23:33:54,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:33:54,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:33:54,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:33:54,378 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-07-23 23:33:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:54,433 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 23:33:54,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:33:54,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-07-23 23:33:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:54,436 INFO L225 Difference]: With dead ends: 22 [2018-07-23 23:33:54,436 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:33:54,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:33:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:33:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 23:33:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 23:33:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 23:33:54,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-23 23:33:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:54,443 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 23:33:54,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:33:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 23:33:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 23:33:54,446 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:54,446 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:54,446 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-07-23 23:33:54,447 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:54,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:54,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:54,595 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:54,595 INFO L221 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 [2018-07-23 23:33:54,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:33:54,643 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-23 23:33:54,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:54,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:54,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:54,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-23 23:33:54,682 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:33:54,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:33:54,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:33:54,683 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-07-23 23:33:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:55,059 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 23:33:55,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:33:55,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-07-23 23:33:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:55,065 INFO L225 Difference]: With dead ends: 24 [2018-07-23 23:33:55,065 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 23:33:55,065 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:33:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 23:33:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 23:33:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:33:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 23:33:55,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-07-23 23:33:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:55,070 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 23:33:55,070 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:33:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 23:33:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:33:55,071 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:55,071 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:55,071 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-07-23 23:33:55,072 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:55,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:55,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:55,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:55,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-23 23:33:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-23 23:33:55,147 INFO L419 BasicCegarLoop]: Counterexample might be feasible [2018-07-23 23:33:55,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:33:55 BoogieIcfgContainer [2018-07-23 23:33:55,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:33:55,173 INFO L168 Benchmark]: Toolchain (without parser) took 3395.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -625.1 MB). Peak memory consumption was 99.4 MB. Max. memory is 7.1 GB. [2018-07-23 23:33:55,175 INFO L168 Benchmark]: CDTParser took 0.28 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. [2018-07-23 23:33:55,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.67 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. [2018-07-23 23:33:55,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.49 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. [2018-07-23 23:33:55,179 INFO L168 Benchmark]: Boogie Preprocessor took 21.70 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. [2018-07-23 23:33:55,179 INFO L168 Benchmark]: RCFGBuilder took 370.22 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-07-23 23:33:55,181 INFO L168 Benchmark]: TraceAbstraction took 2708.26 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: 141.3 MB). Peak memory consumption was 141.3 MB. Max. memory is 7.1 GB. [2018-07-23 23:33:55,187 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 257.67 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 32.49 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 21.70 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 370.22 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 724.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2708.26 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: 141.3 MB). Peak memory consumption was 141.3 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++ [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 [L11] COND FALSE !(x < 6) [L15] CALL __VERIFIER_assert(x != 6) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. UNSAFE Result, 2.6s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 0 SDslu, 134 SDs, 0 SdLazy, 154 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s 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, 1.1s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 7893 SizeOfPredicates, 0 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 75 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! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_false-unreach-call2_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-33-55-208.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_false-unreach-call2_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-33-55-208.csv Received shutdown request...