java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:25:09,213 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:25:09,215 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:25:09,228 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:25:09,229 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:25:09,230 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:25:09,231 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:25:09,233 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:25:09,235 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:25:09,236 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:25:09,237 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:25:09,237 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:25:09,238 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:25:09,239 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:25:09,240 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:25:09,241 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:25:09,242 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:25:09,244 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:25:09,246 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:25:09,248 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:25:09,249 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:25:09,251 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:25:09,254 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:25:09,264 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:25:09,290 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:25:09,291 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:25:09,292 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:25:09,292 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:25:09,293 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:25:09,293 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:25:09,293 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:25:09,293 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:25:09,294 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:25:09,295 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:25:09,295 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:25:09,295 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:25:09,295 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:25:09,296 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:25:09,296 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:25:09,296 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:25:09,296 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:25:09,296 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:25:09,297 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:25:09,297 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:25:09,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:25:09,297 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:25:09,297 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:25:09,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:25:09,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:25:09,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:25:09,383 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:25:09,384 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:25:09,384 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c [2018-10-23 20:25:09,452 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e1d4598dd/d30ad042cacd4f379d71b1e46f5cd8f0/FLAG6db2cae9d [2018-10-23 20:25:10,051 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:25:10,052 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c [2018-10-23 20:25:10,075 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e1d4598dd/d30ad042cacd4f379d71b1e46f5cd8f0/FLAG6db2cae9d [2018-10-23 20:25:10,098 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e1d4598dd/d30ad042cacd4f379d71b1e46f5cd8f0 [2018-10-23 20:25:10,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:25:10,115 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:25:10,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:25:10,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:25:10,122 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:25:10,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:10,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b52dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10, skipping insertion in model container [2018-10-23 20:25:10,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:10,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:25:10,226 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:25:10,809 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:25:10,814 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:25:10,936 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:25:10,957 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:25:10,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10 WrapperNode [2018-10-23 20:25:10,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:25:10,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:25:10,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:25:10,959 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:25:10,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:25:11,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:25:11,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:25:11,184 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:25:11,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... [2018-10-23 20:25:11,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:25:11,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:25:11,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:25:11,301 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:25:11,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:25:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:25:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:25:11,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:25:14,815 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:25:14,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:14 BoogieIcfgContainer [2018-10-23 20:25:14,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:25:14,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:25:14,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:25:14,822 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:25:14,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:10" (1/3) ... [2018-10-23 20:25:14,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e797314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:14, skipping insertion in model container [2018-10-23 20:25:14,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:10" (2/3) ... [2018-10-23 20:25:14,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e797314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:14, skipping insertion in model container [2018-10-23 20:25:14,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:14" (3/3) ... [2018-10-23 20:25:14,827 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label09_true-unreach-call_false-termination.c [2018-10-23 20:25:14,837 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:25:14,846 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:25:14,859 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:25:14,892 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:25:14,893 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:25:14,893 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:25:14,893 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:25:14,893 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:25:14,893 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:25:14,894 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:25:14,894 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:25:14,894 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:25:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2018-10-23 20:25:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 20:25:14,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:14,928 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:14,930 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:14,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash 279835594, now seen corresponding path program 1 times [2018-10-23 20:25:14,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:14,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:15,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:25:15,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:15,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:25:15,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:25:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:25:15,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:15,423 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 4 states. [2018-10-23 20:25:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:19,217 INFO L93 Difference]: Finished difference Result 870 states and 1578 transitions. [2018-10-23 20:25:19,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:25:19,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-10-23 20:25:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:19,245 INFO L225 Difference]: With dead ends: 870 [2018-10-23 20:25:19,245 INFO L226 Difference]: Without dead ends: 617 [2018-10-23 20:25:19,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-10-23 20:25:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2018-10-23 20:25:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-10-23 20:25:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 940 transitions. [2018-10-23 20:25:19,349 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 940 transitions. Word has length 46 [2018-10-23 20:25:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:19,350 INFO L481 AbstractCegarLoop]: Abstraction has 617 states and 940 transitions. [2018-10-23 20:25:19,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:25:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 940 transitions. [2018-10-23 20:25:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-23 20:25:19,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:19,359 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:19,359 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:19,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1096666001, now seen corresponding path program 1 times [2018-10-23 20:25:19,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:19,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:19,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:19,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:25:19,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:19,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:25:19,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:25:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:25:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:25:19,983 INFO L87 Difference]: Start difference. First operand 617 states and 940 transitions. Second operand 6 states. [2018-10-23 20:25:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:25,791 INFO L93 Difference]: Finished difference Result 3026 states and 4618 transitions. [2018-10-23 20:25:25,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:25:25,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2018-10-23 20:25:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:25,806 INFO L225 Difference]: With dead ends: 3026 [2018-10-23 20:25:25,806 INFO L226 Difference]: Without dead ends: 2411 [2018-10-23 20:25:25,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:25:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2018-10-23 20:25:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1870. [2018-10-23 20:25:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2018-10-23 20:25:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2494 transitions. [2018-10-23 20:25:25,905 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2494 transitions. Word has length 155 [2018-10-23 20:25:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:25,906 INFO L481 AbstractCegarLoop]: Abstraction has 1870 states and 2494 transitions. [2018-10-23 20:25:25,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:25:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2494 transitions. [2018-10-23 20:25:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-23 20:25:25,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:25,922 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:25,922 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:25,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 256002721, now seen corresponding path program 1 times [2018-10-23 20:25:25,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:25,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:25,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:25,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:25,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-23 20:25:26,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:26,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:25:26,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:25:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:25:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:26,155 INFO L87 Difference]: Start difference. First operand 1870 states and 2494 transitions. Second operand 4 states. [2018-10-23 20:25:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:29,578 INFO L93 Difference]: Finished difference Result 5170 states and 7227 transitions. [2018-10-23 20:25:29,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:25:29,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 222 [2018-10-23 20:25:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:29,597 INFO L225 Difference]: With dead ends: 5170 [2018-10-23 20:25:29,597 INFO L226 Difference]: Without dead ends: 3302 [2018-10-23 20:25:29,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2018-10-23 20:25:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3302. [2018-10-23 20:25:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3302 states. [2018-10-23 20:25:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 4301 transitions. [2018-10-23 20:25:29,672 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 4301 transitions. Word has length 222 [2018-10-23 20:25:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:29,673 INFO L481 AbstractCegarLoop]: Abstraction has 3302 states and 4301 transitions. [2018-10-23 20:25:29,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:25:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 4301 transitions. [2018-10-23 20:25:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-23 20:25:29,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:29,679 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:29,679 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:29,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1243089956, now seen corresponding path program 1 times [2018-10-23 20:25:29,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:29,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:29,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:29,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:29,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:30,117 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-23 20:25:30,353 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 20:25:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 148 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-23 20:25:30,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:25:30,455 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:25:30,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:30,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:25:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-23 20:25:30,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:25:30,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 20:25:30,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:25:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:25:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:25:30,776 INFO L87 Difference]: Start difference. First operand 3302 states and 4301 transitions. Second operand 6 states. [2018-10-23 20:25:31,930 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-23 20:25:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:37,992 INFO L93 Difference]: Finished difference Result 9124 states and 11710 transitions. [2018-10-23 20:25:37,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:25:37,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 236 [2018-10-23 20:25:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:38,017 INFO L225 Difference]: With dead ends: 9124 [2018-10-23 20:25:38,017 INFO L226 Difference]: Without dead ends: 5463 [2018-10-23 20:25:38,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:25:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2018-10-23 20:25:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 3285. [2018-10-23 20:25:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3285 states. [2018-10-23 20:25:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 3842 transitions. [2018-10-23 20:25:38,101 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 3842 transitions. Word has length 236 [2018-10-23 20:25:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:38,101 INFO L481 AbstractCegarLoop]: Abstraction has 3285 states and 3842 transitions. [2018-10-23 20:25:38,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:25:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 3842 transitions. [2018-10-23 20:25:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-10-23 20:25:38,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:38,109 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:38,109 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:38,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2076395288, now seen corresponding path program 1 times [2018-10-23 20:25:38,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:38,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:38,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:38,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:38,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:38,621 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-10-23 20:25:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 286 proven. 46 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-23 20:25:38,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:25:38,964 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:25:38,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:39,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:25:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 309 proven. 23 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-23 20:25:39,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:25:39,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-23 20:25:39,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:25:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:25:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:25:39,694 INFO L87 Difference]: Start difference. First operand 3285 states and 3842 transitions. Second operand 9 states. [2018-10-23 20:25:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:44,862 INFO L93 Difference]: Finished difference Result 6815 states and 7936 transitions. [2018-10-23 20:25:44,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:25:44,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 353 [2018-10-23 20:25:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:44,881 INFO L225 Difference]: With dead ends: 6815 [2018-10-23 20:25:44,881 INFO L226 Difference]: Without dead ends: 3711 [2018-10-23 20:25:44,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:25:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2018-10-23 20:25:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3464. [2018-10-23 20:25:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3464 states. [2018-10-23 20:25:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 4021 transitions. [2018-10-23 20:25:44,947 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 4021 transitions. Word has length 353 [2018-10-23 20:25:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:44,947 INFO L481 AbstractCegarLoop]: Abstraction has 3464 states and 4021 transitions. [2018-10-23 20:25:44,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:25:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 4021 transitions. [2018-10-23 20:25:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-23 20:25:44,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:44,958 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:44,958 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:44,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1406253511, now seen corresponding path program 1 times [2018-10-23 20:25:44,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:44,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:44,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:44,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:44,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-10-23 20:25:45,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:45,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:25:45,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:25:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:25:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:25:45,419 INFO L87 Difference]: Start difference. First operand 3464 states and 4021 transitions. Second operand 3 states. [2018-10-23 20:25:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:46,581 INFO L93 Difference]: Finished difference Result 7105 states and 8305 transitions. [2018-10-23 20:25:46,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:25:46,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 438 [2018-10-23 20:25:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:46,640 INFO L225 Difference]: With dead ends: 7105 [2018-10-23 20:25:46,640 INFO L226 Difference]: Without dead ends: 3822 [2018-10-23 20:25:46,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:25:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2018-10-23 20:25:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3643. [2018-10-23 20:25:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3643 states. [2018-10-23 20:25:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 4246 transitions. [2018-10-23 20:25:46,703 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 4246 transitions. Word has length 438 [2018-10-23 20:25:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:46,704 INFO L481 AbstractCegarLoop]: Abstraction has 3643 states and 4246 transitions. [2018-10-23 20:25:46,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:25:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 4246 transitions. [2018-10-23 20:25:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-23 20:25:46,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:46,717 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:46,717 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:46,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -807291830, now seen corresponding path program 1 times [2018-10-23 20:25:46,718 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:46,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:46,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:46,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:46,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-10-23 20:25:47,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:47,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:25:47,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:25:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:25:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:47,060 INFO L87 Difference]: Start difference. First operand 3643 states and 4246 transitions. Second operand 4 states. [2018-10-23 20:25:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:48,513 INFO L93 Difference]: Finished difference Result 10327 states and 12381 transitions. [2018-10-23 20:25:48,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:25:48,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 459 [2018-10-23 20:25:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:48,542 INFO L225 Difference]: With dead ends: 10327 [2018-10-23 20:25:48,542 INFO L226 Difference]: Without dead ends: 6865 [2018-10-23 20:25:48,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6865 states. [2018-10-23 20:25:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6865 to 6865. [2018-10-23 20:25:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6865 states. [2018-10-23 20:25:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 7809 transitions. [2018-10-23 20:25:48,665 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 7809 transitions. Word has length 459 [2018-10-23 20:25:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:48,666 INFO L481 AbstractCegarLoop]: Abstraction has 6865 states and 7809 transitions. [2018-10-23 20:25:48,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:25:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 7809 transitions. [2018-10-23 20:25:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-23 20:25:48,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:48,678 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:48,678 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:48,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash -772093792, now seen corresponding path program 1 times [2018-10-23 20:25:48,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:48,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:48,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:49,300 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:25:49,617 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-23 20:25:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 1205 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-10-23 20:25:50,211 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:50,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:25:50,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:25:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:25:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:25:50,213 INFO L87 Difference]: Start difference. First operand 6865 states and 7809 transitions. Second operand 5 states. [2018-10-23 20:25:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:52,046 INFO L93 Difference]: Finished difference Result 14981 states and 17236 transitions. [2018-10-23 20:25:52,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:25:52,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 651 [2018-10-23 20:25:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:52,077 INFO L225 Difference]: With dead ends: 14981 [2018-10-23 20:25:52,077 INFO L226 Difference]: Without dead ends: 8297 [2018-10-23 20:25:52,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:25:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2018-10-23 20:25:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 8297. [2018-10-23 20:25:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8297 states. [2018-10-23 20:25:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 9329 transitions. [2018-10-23 20:25:52,202 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 9329 transitions. Word has length 651 [2018-10-23 20:25:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:52,203 INFO L481 AbstractCegarLoop]: Abstraction has 8297 states and 9329 transitions. [2018-10-23 20:25:52,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:25:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 9329 transitions. [2018-10-23 20:25:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-10-23 20:25:52,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:52,212 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:52,212 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:52,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 736057852, now seen corresponding path program 1 times [2018-10-23 20:25:52,213 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:52,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:52,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:52,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:52,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1017 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2018-10-23 20:25:53,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:25:53,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:25:53,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:25:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:25:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:53,027 INFO L87 Difference]: Start difference. First operand 8297 states and 9329 transitions. Second operand 4 states. [2018-10-23 20:25:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:25:55,839 INFO L93 Difference]: Finished difference Result 18023 states and 20321 transitions. [2018-10-23 20:25:55,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:25:55,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 713 [2018-10-23 20:25:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:25:55,858 INFO L225 Difference]: With dead ends: 18023 [2018-10-23 20:25:55,858 INFO L226 Difference]: Without dead ends: 9907 [2018-10-23 20:25:55,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:25:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2018-10-23 20:25:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 9907. [2018-10-23 20:25:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9907 states. [2018-10-23 20:25:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 10862 transitions. [2018-10-23 20:25:55,998 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 10862 transitions. Word has length 713 [2018-10-23 20:25:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:25:55,999 INFO L481 AbstractCegarLoop]: Abstraction has 9907 states and 10862 transitions. [2018-10-23 20:25:55,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:25:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 10862 transitions. [2018-10-23 20:25:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2018-10-23 20:25:56,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:25:56,009 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:25:56,009 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:25:56,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:25:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1521446553, now seen corresponding path program 1 times [2018-10-23 20:25:56,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:25:56,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:25:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:56,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:25:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:56,821 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-23 20:25:57,285 WARN L179 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2018-10-23 20:25:57,520 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2018-10-23 20:25:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 663 proven. 372 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-23 20:25:58,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:25:58,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:25:58,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:25:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:25:58,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:25:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-23 20:25:59,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:25:59,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2018-10-23 20:25:59,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:25:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:25:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:25:59,949 INFO L87 Difference]: Start difference. First operand 9907 states and 10862 transitions. Second operand 13 states. [2018-10-23 20:26:00,405 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2018-10-23 20:26:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:26:09,408 INFO L93 Difference]: Finished difference Result 20481 states and 22627 transitions. [2018-10-23 20:26:09,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 20:26:09,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 769 [2018-10-23 20:26:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:26:09,434 INFO L225 Difference]: With dead ends: 20481 [2018-10-23 20:26:09,434 INFO L226 Difference]: Without dead ends: 10390 [2018-10-23 20:26:09,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 768 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-23 20:26:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2018-10-23 20:26:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 10262. [2018-10-23 20:26:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10262 states. [2018-10-23 20:26:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10262 states to 10262 states and 11066 transitions. [2018-10-23 20:26:09,568 INFO L78 Accepts]: Start accepts. Automaton has 10262 states and 11066 transitions. Word has length 769 [2018-10-23 20:26:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:26:09,569 INFO L481 AbstractCegarLoop]: Abstraction has 10262 states and 11066 transitions. [2018-10-23 20:26:09,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:26:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10262 states and 11066 transitions. [2018-10-23 20:26:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2018-10-23 20:26:09,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:26:09,580 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:26:09,580 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:26:09,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:26:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1043164057, now seen corresponding path program 1 times [2018-10-23 20:26:09,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:26:09,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:26:09,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:09,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:09,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 892 proven. 0 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2018-10-23 20:26:10,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:26:10,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:26:10,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:26:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:26:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:26:10,559 INFO L87 Difference]: Start difference. First operand 10262 states and 11066 transitions. Second operand 5 states. [2018-10-23 20:26:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:26:12,196 INFO L93 Difference]: Finished difference Result 22325 states and 24082 transitions. [2018-10-23 20:26:12,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:26:12,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 809 [2018-10-23 20:26:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:26:12,210 INFO L225 Difference]: With dead ends: 22325 [2018-10-23 20:26:12,210 INFO L226 Difference]: Without dead ends: 12065 [2018-10-23 20:26:12,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:26:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12065 states. [2018-10-23 20:26:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12065 to 10982. [2018-10-23 20:26:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10982 states. [2018-10-23 20:26:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 11846 transitions. [2018-10-23 20:26:12,361 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 11846 transitions. Word has length 809 [2018-10-23 20:26:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:26:12,362 INFO L481 AbstractCegarLoop]: Abstraction has 10982 states and 11846 transitions. [2018-10-23 20:26:12,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:26:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 11846 transitions. [2018-10-23 20:26:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2018-10-23 20:26:12,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:26:12,374 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:26:12,374 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:26:12,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:26:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1194644164, now seen corresponding path program 1 times [2018-10-23 20:26:12,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:26:12,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:26:12,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:12,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:12,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:13,164 WARN L179 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 20:26:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 1245 proven. 0 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2018-10-23 20:26:13,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:26:13,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:26:13,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:26:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:26:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:26:13,562 INFO L87 Difference]: Start difference. First operand 10982 states and 11846 transitions. Second operand 4 states. [2018-10-23 20:26:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:26:14,727 INFO L93 Difference]: Finished difference Result 21783 states and 23510 transitions. [2018-10-23 20:26:14,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:26:14,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 854 [2018-10-23 20:26:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:26:14,736 INFO L225 Difference]: With dead ends: 21783 [2018-10-23 20:26:14,736 INFO L226 Difference]: Without dead ends: 10982 [2018-10-23 20:26:14,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:26:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2018-10-23 20:26:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10982. [2018-10-23 20:26:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10982 states. [2018-10-23 20:26:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 11713 transitions. [2018-10-23 20:26:14,865 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 11713 transitions. Word has length 854 [2018-10-23 20:26:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:26:14,866 INFO L481 AbstractCegarLoop]: Abstraction has 10982 states and 11713 transitions. [2018-10-23 20:26:14,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:26:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 11713 transitions. [2018-10-23 20:26:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2018-10-23 20:26:14,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:26:14,880 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:26:14,880 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:26:14,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:26:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash -267445699, now seen corresponding path program 1 times [2018-10-23 20:26:14,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:26:14,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:26:14,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:14,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:14,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:15,663 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 20:26:16,048 WARN L179 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2018-10-23 20:26:16,274 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-10-23 20:26:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 858 proven. 773 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-23 20:26:17,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:26:17,989 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:26:17,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:18,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:26:18,910 WARN L179 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-10-23 20:26:20,069 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 27 [2018-10-23 20:26:26,612 WARN L179 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 246 DAG size of output: 41 [2018-10-23 20:26:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 634 proven. 733 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-23 20:26:28,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:26:28,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2018-10-23 20:26:28,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 20:26:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 20:26:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2018-10-23 20:26:28,776 INFO L87 Difference]: Start difference. First operand 10982 states and 11713 transitions. Second operand 16 states. [2018-10-23 20:26:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:26:50,528 INFO L93 Difference]: Finished difference Result 23251 states and 24787 transitions. [2018-10-23 20:26:50,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 20:26:50,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 928 [2018-10-23 20:26:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:26:50,543 INFO L225 Difference]: With dead ends: 23251 [2018-10-23 20:26:50,543 INFO L226 Difference]: Without dead ends: 12092 [2018-10-23 20:26:50,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 924 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-10-23 20:26:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12092 states. [2018-10-23 20:26:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12092 to 11161. [2018-10-23 20:26:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11161 states. [2018-10-23 20:26:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 11898 transitions. [2018-10-23 20:26:50,691 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 11898 transitions. Word has length 928 [2018-10-23 20:26:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:26:50,692 INFO L481 AbstractCegarLoop]: Abstraction has 11161 states and 11898 transitions. [2018-10-23 20:26:50,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 20:26:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 11898 transitions. [2018-10-23 20:26:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1059 [2018-10-23 20:26:50,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:26:50,710 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:26:50,711 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:26:50,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:26:50,711 INFO L82 PathProgramCache]: Analyzing trace with hash 950184563, now seen corresponding path program 1 times [2018-10-23 20:26:50,711 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:26:50,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:26:50,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:50,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:50,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:26:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3322 backedges. 199 proven. 1861 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2018-10-23 20:26:53,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:26:53,682 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:26:53,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:26:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:26:53,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:27:02,493 WARN L179 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 188 DAG size of output: 50 [2018-10-23 20:27:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3322 backedges. 489 proven. 351 refuted. 0 times theorem prover too weak. 2482 trivial. 0 not checked. [2018-10-23 20:27:04,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:27:04,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 15 [2018-10-23 20:27:04,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 20:27:04,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 20:27:04,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-10-23 20:27:04,272 INFO L87 Difference]: Start difference. First operand 11161 states and 11898 transitions. Second operand 16 states. [2018-10-23 20:27:24,738 WARN L179 SmtUtils]: Spent 14.15 s on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2018-10-23 20:27:36,911 WARN L179 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2018-10-23 20:28:00,893 WARN L179 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2018-10-23 20:28:15,129 WARN L179 SmtUtils]: Spent 14.20 s on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-10-23 20:28:44,121 WARN L179 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2018-10-23 20:29:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:03,285 INFO L93 Difference]: Finished difference Result 29546 states and 31553 transitions. [2018-10-23 20:29:03,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 20:29:03,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1058 [2018-10-23 20:29:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:03,304 INFO L225 Difference]: With dead ends: 29546 [2018-10-23 20:29:03,304 INFO L226 Difference]: Without dead ends: 18200 [2018-10-23 20:29:03,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 1056 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=950, Invalid=3082, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 20:29:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18200 states. [2018-10-23 20:29:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18200 to 12059. [2018-10-23 20:29:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12059 states. [2018-10-23 20:29:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12059 states to 12059 states and 12769 transitions. [2018-10-23 20:29:03,480 INFO L78 Accepts]: Start accepts. Automaton has 12059 states and 12769 transitions. Word has length 1058 [2018-10-23 20:29:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:03,481 INFO L481 AbstractCegarLoop]: Abstraction has 12059 states and 12769 transitions. [2018-10-23 20:29:03,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 20:29:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12059 states and 12769 transitions. [2018-10-23 20:29:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2119 [2018-10-23 20:29:03,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:03,602 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:03,603 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:03,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1547180355, now seen corresponding path program 1 times [2018-10-23 20:29:03,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:03,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:03,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:03,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:03,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14444 backedges. 3095 proven. 0 refuted. 0 times theorem prover too weak. 11349 trivial. 0 not checked. [2018-10-23 20:29:06,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:06,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-23 20:29:06,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:29:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:29:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:29:06,602 INFO L87 Difference]: Start difference. First operand 12059 states and 12769 transitions. Second operand 7 states. [2018-10-23 20:29:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:08,954 INFO L93 Difference]: Finished difference Result 24960 states and 26477 transitions. [2018-10-23 20:29:08,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:29:08,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2118 [2018-10-23 20:29:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:08,963 INFO L225 Difference]: With dead ends: 24960 [2018-10-23 20:29:08,963 INFO L226 Difference]: Without dead ends: 12054 [2018-10-23 20:29:08,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:29:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2018-10-23 20:29:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 12054. [2018-10-23 20:29:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12054 states. [2018-10-23 20:29:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 12717 transitions. [2018-10-23 20:29:09,098 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 12717 transitions. Word has length 2118 [2018-10-23 20:29:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:09,099 INFO L481 AbstractCegarLoop]: Abstraction has 12054 states and 12717 transitions. [2018-10-23 20:29:09,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:29:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 12717 transitions. [2018-10-23 20:29:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2153 [2018-10-23 20:29:09,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:09,129 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 11, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:09,130 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:09,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 372411892, now seen corresponding path program 1 times [2018-10-23 20:29:09,131 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:09,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:09,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:09,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14891 backedges. 3466 proven. 39 refuted. 0 times theorem prover too weak. 11386 trivial. 0 not checked. [2018-10-23 20:29:12,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:29:12,274 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:12,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Received shutdown request... [2018-10-23 20:29:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:12,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:29:12,847 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 20:29:13,049 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:13,049 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:29:13,054 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:29:13,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:29:13 BoogieIcfgContainer [2018-10-23 20:29:13,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:29:13,055 INFO L168 Benchmark]: Toolchain (without parser) took 242942.63 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -669.1 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,056 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:29:13,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 839.96 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 224.56 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -816.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,059 INFO L168 Benchmark]: Boogie Preprocessor took 116.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,059 INFO L168 Benchmark]: RCFGBuilder took 3516.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.3 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,060 INFO L168 Benchmark]: TraceAbstraction took 238236.88 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -27.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-23 20:29:13,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 839.96 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 224.56 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -816.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3516.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.3 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238236.88 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -27.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 139). Cancelled while BasicCegarLoop was analyzing trace of length 2153 with TraceHistMax 18,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 246 locations, 1 error locations. TIMEOUT Result, 238.1s OverallTime, 16 OverallIterations, 18 TraceHistogramMax, 188.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2184 SDtfs, 20414 SDslu, 2761 SDs, 0 SdLazy, 33831 SolverSat, 5155 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 112.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3526 GetRequests, 3352 SyntacticMatches, 23 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 89.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12059occurred in iteration=14, 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: 1.6s AutomataMinimizationTime, 15 MinimizatonAttempts, 11428 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 33.0s InterpolantComputationTime, 13153 NumberOfCodeBlocks, 13153 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 13133 ConstructedInterpolants, 228 QuantifiedInterpolants, 59040814 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4116 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 20 InterpolantComputations, 12 PerfectInterpolantSequences, 35789/39953 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown