java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 11:29:07,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 11:29:07,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 11:29:07,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 11:29:07,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 11:29:07,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 11:29:07,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 11:29:07,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 11:29:07,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 11:29:07,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 11:29:07,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 11:29:07,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 11:29:07,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 11:29:07,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 11:29:07,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 11:29:07,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 11:29:07,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 11:29:07,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 11:29:07,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 11:29:07,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 11:29:07,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 11:29:07,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 11:29:07,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 11:29:07,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 11:29:07,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 11:29:07,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 11:29:07,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 11:29:07,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 11:29:07,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 11:29:07,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 11:29:07,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 11:29:07,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 11:29:07,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 11:29:07,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 11:29:07,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 11:29:07,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 11:29:07,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-05 11:29:07,290 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 11:29:07,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 11:29:07,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 11:29:07,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 11:29:07,293 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 11:29:07,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 11:29:07,294 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 11:29:07,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 11:29:07,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 11:29:07,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 11:29:07,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 11:29:07,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 11:29:07,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 11:29:07,296 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 11:29:07,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 11:29:07,297 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 11:29:07,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 11:29:07,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 11:29:07,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 11:29:07,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 11:29:07,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 11:29:07,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:29:07,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 11:29:07,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 11:29:07,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 11:29:07,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 11:29:07,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 11:29:07,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 11:29:07,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 11:29:07,355 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 11:29:07,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 11:29:07,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 11:29:07,378 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 11:29:07,379 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 11:29:07,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2019-09-05 11:29:07,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fddbccb/7b48fc7d74974275b7e07f1a127657ea/FLAGee99111be [2019-09-05 11:29:07,918 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 11:29:07,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2019-09-05 11:29:07,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fddbccb/7b48fc7d74974275b7e07f1a127657ea/FLAGee99111be [2019-09-05 11:29:08,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fddbccb/7b48fc7d74974275b7e07f1a127657ea [2019-09-05 11:29:08,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 11:29:08,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 11:29:08,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 11:29:08,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 11:29:08,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 11:29:08,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c9ffa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08, skipping insertion in model container [2019-09-05 11:29:08,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,301 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 11:29:08,321 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 11:29:08,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:29:08,571 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 11:29:08,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:29:08,743 INFO L192 MainTranslator]: Completed translation [2019-09-05 11:29:08,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08 WrapperNode [2019-09-05 11:29:08,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 11:29:08,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 11:29:08,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 11:29:08,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 11:29:08,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... [2019-09-05 11:29:08,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 11:29:08,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 11:29:08,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 11:29:08,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 11:29:08,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:29:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 11:29:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 11:29:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 11:29:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 11:29:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 11:29:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 11:29:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 11:29:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 11:29:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 11:29:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-09-05 11:29:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 11:29:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 11:29:09,081 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 11:29:09,082 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-05 11:29:09,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:29:09 BoogieIcfgContainer [2019-09-05 11:29:09,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 11:29:09,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 11:29:09,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 11:29:09,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 11:29:09,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 11:29:08" (1/3) ... [2019-09-05 11:29:09,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ce06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:29:09, skipping insertion in model container [2019-09-05 11:29:09,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:29:08" (2/3) ... [2019-09-05 11:29:09,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ce06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:29:09, skipping insertion in model container [2019-09-05 11:29:09,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:29:09" (3/3) ... [2019-09-05 11:29:09,095 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2019-09-05 11:29:09,109 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 11:29:09,118 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 11:29:09,154 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 11:29:09,196 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 11:29:09,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 11:29:09,197 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 11:29:09,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 11:29:09,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 11:29:09,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 11:29:09,198 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 11:29:09,199 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 11:29:09,199 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 11:29:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-05 11:29:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-05 11:29:09,222 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:09,223 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:09,225 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-09-05 11:29:09,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:09,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:09,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:09,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:29:09,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:29:09,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 11:29:09,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 11:29:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 11:29:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 11:29:09,382 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-05 11:29:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:09,406 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-09-05 11:29:09,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 11:29:09,408 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-09-05 11:29:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:09,419 INFO L225 Difference]: With dead ends: 32 [2019-09-05 11:29:09,419 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 11:29:09,423 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 11:29:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 11:29:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 11:29:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 11:29:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-09-05 11:29:09,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-09-05 11:29:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:09,476 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-09-05 11:29:09,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 11:29:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-09-05 11:29:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-05 11:29:09,479 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:09,479 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:09,480 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-09-05 11:29:09,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:09,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:09,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:29:09,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:29:09,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 11:29:09,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 11:29:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 11:29:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:29:09,641 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-09-05 11:29:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:09,695 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-05 11:29:09,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 11:29:09,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-05 11:29:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:09,697 INFO L225 Difference]: With dead ends: 24 [2019-09-05 11:29:09,697 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 11:29:09,699 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:29:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 11:29:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-09-05 11:29:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 11:29:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 11:29:09,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-09-05 11:29:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:09,707 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 11:29:09,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 11:29:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 11:29:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 11:29:09,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:09,709 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:09,710 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-09-05 11:29:09,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:09,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:09,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:09,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:29:09,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:09,812 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:29:09,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:09,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-05 11:29:09,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:29:09,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 11:29:09,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2019-09-05 11:29:09,901 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 11:29:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 11:29:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-05 11:29:09,902 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-05 11:29:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:10,036 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-09-05 11:29:10,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 11:29:10,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-05 11:29:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:10,039 INFO L225 Difference]: With dead ends: 48 [2019-09-05 11:29:10,040 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 11:29:10,042 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:29:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 11:29:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-09-05 11:29:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 11:29:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-05 11:29:10,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-09-05 11:29:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:10,057 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-05 11:29:10,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 11:29:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-05 11:29:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 11:29:10,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:10,059 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:10,060 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1308348629, now seen corresponding path program 1 times [2019-09-05 11:29:10,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:10,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:10,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:10,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:10,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-05 11:29:10,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:10,213 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:10,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:10,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-05 11:29:10,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 11:29:10,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 11:29:10,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-05 11:29:10,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 11:29:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 11:29:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-05 11:29:10,305 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-09-05 11:29:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:10,518 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2019-09-05 11:29:10,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 11:29:10,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-05 11:29:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:10,520 INFO L225 Difference]: With dead ends: 66 [2019-09-05 11:29:10,520 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 11:29:10,521 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-09-05 11:29:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 11:29:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2019-09-05 11:29:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 11:29:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-09-05 11:29:10,533 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 21 [2019-09-05 11:29:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:10,533 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-09-05 11:29:10,535 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 11:29:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-09-05 11:29:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 11:29:10,537 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:10,537 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:10,537 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1611011581, now seen corresponding path program 1 times [2019-09-05 11:29:10,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:10,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:10,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:10,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:10,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-05 11:29:10,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:10,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:29:10,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:10,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-05 11:29:10,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:29:10,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:29:10,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-05 11:29:10,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 11:29:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 11:29:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:29:10,829 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-09-05 11:29:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:10,905 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2019-09-05 11:29:10,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 11:29:10,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-09-05 11:29:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:10,907 INFO L225 Difference]: With dead ends: 73 [2019-09-05 11:29:10,908 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 11:29:10,908 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:29:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 11:29:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-09-05 11:29:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 11:29:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-09-05 11:29:10,927 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-09-05 11:29:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:10,927 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-09-05 11:29:10,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 11:29:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-09-05 11:29:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 11:29:10,930 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:10,930 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:10,930 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash 351043197, now seen corresponding path program 2 times [2019-09-05 11:29:10,931 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:10,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:10,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:10,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:29:10,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-05 11:29:11,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:11,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:11,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 11:29:11,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:29:11,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:29:11,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 11:29:11,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-05 11:29:11,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:29:11,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-05 11:29:11,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 11:29:11,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 11:29:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 11:29:11,255 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-09-05 11:29:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:11,547 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2019-09-05 11:29:11,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 11:29:11,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2019-09-05 11:29:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:11,552 INFO L225 Difference]: With dead ends: 132 [2019-09-05 11:29:11,552 INFO L226 Difference]: Without dead ends: 101 [2019-09-05 11:29:11,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-09-05 11:29:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-05 11:29:11,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2019-09-05 11:29:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-05 11:29:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-09-05 11:29:11,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 43 [2019-09-05 11:29:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:11,583 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-09-05 11:29:11,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 11:29:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-09-05 11:29:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-05 11:29:11,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:11,587 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:11,587 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1822793022, now seen corresponding path program 3 times [2019-09-05 11:29:11,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:11,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:11,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:11,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:29:11,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 136 proven. 9 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2019-09-05 11:29:11,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:11,774 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:11,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 11:29:12,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-05 11:29:12,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:29:12,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 11:29:12,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 143 proven. 9 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-09-05 11:29:12,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:29:12,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-05 11:29:12,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 11:29:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 11:29:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:29:12,244 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 7 states. [2019-09-05 11:29:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:12,323 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2019-09-05 11:29:12,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 11:29:12,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2019-09-05 11:29:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:12,325 INFO L225 Difference]: With dead ends: 149 [2019-09-05 11:29:12,325 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 11:29:12,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:29:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 11:29:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2019-09-05 11:29:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-05 11:29:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-09-05 11:29:12,355 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 72 [2019-09-05 11:29:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:12,358 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-09-05 11:29:12,358 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 11:29:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-09-05 11:29:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 11:29:12,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:12,363 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:12,363 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1202732862, now seen corresponding path program 4 times [2019-09-05 11:29:12,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:12,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:12,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:12,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:29:12,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 216 proven. 16 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-09-05 11:29:12,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:12,631 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:29:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:29:12,718 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:29:12,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:29:12,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 11:29:12,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:29:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 32 proven. 556 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Stream Closed [2019-09-05 11:29:12,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:29:12,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-09-05 11:29:12,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 11:29:12,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 11:29:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:29:12,872 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 15 states. [2019-09-05 11:29:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:29:13,582 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2019-09-05 11:29:13,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 11:29:13,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2019-09-05 11:29:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:29:13,585 INFO L225 Difference]: With dead ends: 232 [2019-09-05 11:29:13,585 INFO L226 Difference]: Without dead ends: 164 [2019-09-05 11:29:13,586 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2019-09-05 11:29:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-05 11:29:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2019-09-05 11:29:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-05 11:29:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2019-09-05 11:29:13,610 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 84 [2019-09-05 11:29:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:29:13,610 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2019-09-05 11:29:13,610 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 11:29:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2019-09-05 11:29:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-05 11:29:13,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:29:13,613 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:29:13,613 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:29:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:29:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1637610595, now seen corresponding path program 5 times [2019-09-05 11:29:13,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:29:13,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:29:13,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:13,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:29:13,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:29:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:29:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2019-09-05 11:29:13,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:29:13,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:29:13,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:30:54,160 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-05 11:30:54,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:30:54,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 11:30:54,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:30:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 1090 proven. 25 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:30:54,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:30:54,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-05 11:30:54,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 11:30:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 11:30:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:30:54,493 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand 9 states. [2019-09-05 11:30:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:54,591 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2019-09-05 11:30:54,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 11:30:54,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-09-05 11:30:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:54,594 INFO L225 Difference]: With dead ends: 257 [2019-09-05 11:30:54,594 INFO L226 Difference]: Without dead ends: 150 [2019-09-05 11:30:54,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:30:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-05 11:30:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2019-09-05 11:30:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-05 11:30:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2019-09-05 11:30:54,608 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 125 [2019-09-05 11:30:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:54,608 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2019-09-05 11:30:54,608 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 11:30:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2019-09-05 11:30:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-05 11:30:54,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:54,610 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:54,610 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2071075997, now seen corresponding path program 6 times [2019-09-05 11:30:54,611 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:54,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:54,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:54,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:30:54,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 610 proven. 36 refuted. 0 times theorem prover too weak. 2132 trivial. 0 not checked. [2019-09-05 11:30:54,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:30:54,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:30:54,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 11:33:48,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-05 11:33:48,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:33:59,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-05 11:33:59,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:34:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1498 proven. 36 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:34:00,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:34:00,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-05 11:34:00,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 11:34:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 11:34:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:34:00,073 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 10 states. [2019-09-05 11:34:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:34:00,196 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2019-09-05 11:34:00,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 11:34:00,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 141 [2019-09-05 11:34:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:34:00,198 INFO L225 Difference]: With dead ends: 287 [2019-09-05 11:34:00,198 INFO L226 Difference]: Without dead ends: 166 [2019-09-05 11:34:00,202 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:34:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-05 11:34:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2019-09-05 11:34:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-05 11:34:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2019-09-05 11:34:00,231 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 141 [2019-09-05 11:34:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:34:00,231 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2019-09-05 11:34:00,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 11:34:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2019-09-05 11:34:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-05 11:34:00,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:34:00,236 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:34:00,236 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:34:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:34:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash 930508189, now seen corresponding path program 7 times [2019-09-05 11:34:00,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:34:00,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:34:00,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:00,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:34:00,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:34:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 806 proven. 49 refuted. 0 times theorem prover too weak. 2811 trivial. 0 not checked. [2019-09-05 11:34:00,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:34:00,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:34:00,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:34:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:34:00,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 11:34:00,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:34:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 1399 proven. 146 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2019-09-05 11:34:00,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:34:00,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-05 11:34:00,877 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 11:34:00,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 11:34:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-09-05 11:34:00,878 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 16 states. [2019-09-05 11:34:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:34:01,630 INFO L93 Difference]: Finished difference Result 473 states and 524 transitions. [2019-09-05 11:34:01,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 11:34:01,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2019-09-05 11:34:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:34:01,633 INFO L225 Difference]: With dead ends: 473 [2019-09-05 11:34:01,633 INFO L226 Difference]: Without dead ends: 338 [2019-09-05 11:34:01,634 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 11:34:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-05 11:34:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 250. [2019-09-05 11:34:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-09-05 11:34:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 266 transitions. [2019-09-05 11:34:01,650 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 266 transitions. Word has length 157 [2019-09-05 11:34:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:34:01,651 INFO L475 AbstractCegarLoop]: Abstraction has 250 states and 266 transitions. [2019-09-05 11:34:01,651 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 11:34:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 266 transitions. [2019-09-05 11:34:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-09-05 11:34:01,654 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:34:01,654 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 12, 12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:34:01,655 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:34:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:34:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1712561805, now seen corresponding path program 8 times [2019-09-05 11:34:01,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:34:01,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:34:01,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:01,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:34:01,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:34:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10540 backedges. 1614 proven. 64 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2019-09-05 11:34:02,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:34:02,132 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:34:02,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:34:02,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:34:02,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:34:02,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 11:34:02,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:34:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10540 backedges. 3994 proven. 488 refuted. 0 times theorem prover too weak. 6058 trivial. 0 not checked. [2019-09-05 11:34:02,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:34:02,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-05 11:34:02,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 11:34:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 11:34:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-09-05 11:34:02,703 INFO L87 Difference]: Start difference. First operand 250 states and 266 transitions. Second operand 19 states. [2019-09-05 11:34:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:34:04,086 INFO L93 Difference]: Finished difference Result 683 states and 746 transitions. [2019-09-05 11:34:04,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-05 11:34:04,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 249 [2019-09-05 11:34:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:34:04,090 INFO L225 Difference]: With dead ends: 683 [2019-09-05 11:34:04,090 INFO L226 Difference]: Without dead ends: 458 [2019-09-05 11:34:04,092 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 11:34:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-09-05 11:34:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 358. [2019-09-05 11:34:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2019-09-05 11:34:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 378 transitions. [2019-09-05 11:34:04,114 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 378 transitions. Word has length 249 [2019-09-05 11:34:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:34:04,115 INFO L475 AbstractCegarLoop]: Abstraction has 358 states and 378 transitions. [2019-09-05 11:34:04,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 11:34:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 378 transitions. [2019-09-05 11:34:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-09-05 11:34:04,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:34:04,121 INFO L399 BasicCegarLoop]: trace histogram [144, 144, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:34:04,122 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:34:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:34:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1172817379, now seen corresponding path program 9 times [2019-09-05 11:34:04,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:34:04,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:34:04,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:04,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:34:04,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:34:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:34:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23342 backedges. 2738 proven. 81 refuted. 0 times theorem prover too weak. 20523 trivial. 0 not checked. [2019-09-05 11:34:04,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:34:04,910 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:34:04,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:36:31,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-05 11:36:31,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:36:31,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 11:36:31,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:36:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23342 backedges. 2699 proven. 975 refuted. 0 times theorem prover too weak. 19668 trivial. 0 not checked. [2019-09-05 11:36:32,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:36:32,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-05 11:36:32,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 11:36:32,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 11:36:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 11:36:32,152 INFO L87 Difference]: Start difference. First operand 358 states and 378 transitions. Second operand 13 states. [2019-09-05 11:36:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:36:32,387 INFO L93 Difference]: Finished difference Result 737 states and 792 transitions. [2019-09-05 11:36:32,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 11:36:32,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 357 [2019-09-05 11:36:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:36:32,390 INFO L225 Difference]: With dead ends: 737 [2019-09-05 11:36:32,391 INFO L226 Difference]: Without dead ends: 406 [2019-09-05 11:36:32,392 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 355 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 11:36:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-09-05 11:36:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 390. [2019-09-05 11:36:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2019-09-05 11:36:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 410 transitions. [2019-09-05 11:36:32,413 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 410 transitions. Word has length 357 [2019-09-05 11:36:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:36:32,413 INFO L475 AbstractCegarLoop]: Abstraction has 390 states and 410 transitions. [2019-09-05 11:36:32,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 11:36:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 410 transitions. [2019-09-05 11:36:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-09-05 11:36:32,419 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:36:32,420 INFO L399 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:36:32,420 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:36:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:36:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -959439843, now seen corresponding path program 10 times [2019-09-05 11:36:32,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:36:32,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:36:32,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:36:32,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:36:32,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:36:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:36:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 28446 backedges. 3338 proven. 100 refuted. 0 times theorem prover too weak. 25008 trivial. 0 not checked. [2019-09-05 11:36:33,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:36:33,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:36:33,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 11:36:33,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:36:33,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:36:33,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-05 11:36:33,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:36:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28446 backedges. 0 proven. 21833 refuted. 0 times theorem prover too weak. 6613 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:36:33,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:36:33,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-05 11:36:33,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 11:36:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 11:36:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-09-05 11:36:33,857 INFO L87 Difference]: Start difference. First operand 390 states and 410 transitions. Second operand 23 states. [2019-09-05 11:36:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:36:36,836 INFO L93 Difference]: Finished difference Result 1012 states and 1086 transitions. [2019-09-05 11:36:36,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-05 11:36:36,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 389 [2019-09-05 11:36:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:36:36,841 INFO L225 Difference]: With dead ends: 1012 [2019-09-05 11:36:36,841 INFO L226 Difference]: Without dead ends: 651 [2019-09-05 11:36:36,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=4893, Unknown=0, NotChecked=0, Total=5256 [2019-09-05 11:36:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-09-05 11:36:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 525. [2019-09-05 11:36:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-09-05 11:36:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 550 transitions. [2019-09-05 11:36:36,873 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 550 transitions. Word has length 389 [2019-09-05 11:36:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:36:36,874 INFO L475 AbstractCegarLoop]: Abstraction has 525 states and 550 transitions. [2019-09-05 11:36:36,874 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 11:36:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 550 transitions. [2019-09-05 11:36:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-09-05 11:36:36,886 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:36:36,886 INFO L399 BasicCegarLoop]: trace histogram [220, 220, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:36:36,887 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:36:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:36:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash -63134274, now seen corresponding path program 11 times [2019-09-05 11:36:36,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:36:36,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:36:36,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:36:36,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:36:36,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:36:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:36:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 53285 backedges. 5064 proven. 121 refuted. 0 times theorem prover too weak. 48100 trivial. 0 not checked. [2019-09-05 11:36:38,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:36:38,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:36:38,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:38:17,266 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-05 11:38:17,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:38:17,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 11:38:17,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:38:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 53285 backedges. 23798 proven. 121 refuted. 0 times theorem prover too weak. 29366 trivial. 0 not checked. [2019-09-05 11:38:17,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:38:17,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-05 11:38:17,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 11:38:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 11:38:17,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:38:17,547 INFO L87 Difference]: Start difference. First operand 525 states and 550 transitions. Second operand 15 states. [2019-09-05 11:38:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:38:17,949 INFO L93 Difference]: Finished difference Result 1079 states and 1148 transitions. [2019-09-05 11:38:17,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 11:38:17,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 524 [2019-09-05 11:38:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:38:17,955 INFO L225 Difference]: With dead ends: 1079 [2019-09-05 11:38:17,955 INFO L226 Difference]: Without dead ends: 585 [2019-09-05 11:38:17,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:38:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-09-05 11:38:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 565. [2019-09-05 11:38:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2019-09-05 11:38:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 590 transitions. [2019-09-05 11:38:18,004 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 590 transitions. Word has length 524 [2019-09-05 11:38:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:38:18,004 INFO L475 AbstractCegarLoop]: Abstraction has 565 states and 590 transitions. [2019-09-05 11:38:18,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 11:38:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 590 transitions. [2019-09-05 11:38:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2019-09-05 11:38:18,012 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:38:18,013 INFO L399 BasicCegarLoop]: trace histogram [240, 240, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:38:18,013 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:38:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:38:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash 378755262, now seen corresponding path program 12 times [2019-09-05 11:38:18,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:38:18,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:38:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:38:18,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:38:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:38:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:38:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 62865 backedges. 5976 proven. 144 refuted. 0 times theorem prover too weak. 56745 trivial. 0 not checked. [2019-09-05 11:38:19,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:38:19,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:38:19,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:41:36,177 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-05 11:41:36,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:41:37,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 11:41:37,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:41:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 62865 backedges. 28070 proven. 144 refuted. 0 times theorem prover too weak. 34651 trivial. 0 not checked. [2019-09-05 11:41:37,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:41:37,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-05 11:41:37,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 11:41:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 11:41:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 11:41:37,850 INFO L87 Difference]: Start difference. First operand 565 states and 590 transitions. Second operand 16 states. [2019-09-05 11:41:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:41:38,237 INFO L93 Difference]: Finished difference Result 1157 states and 1226 transitions. [2019-09-05 11:41:38,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 11:41:38,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 564 [2019-09-05 11:41:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:41:38,240 INFO L225 Difference]: With dead ends: 1157 [2019-09-05 11:41:38,240 INFO L226 Difference]: Without dead ends: 625 [2019-09-05 11:41:38,242 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 563 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 11:41:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2019-09-05 11:41:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 605. [2019-09-05 11:41:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-09-05 11:41:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 630 transitions. [2019-09-05 11:41:38,270 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 630 transitions. Word has length 564 [2019-09-05 11:41:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:41:38,271 INFO L475 AbstractCegarLoop]: Abstraction has 605 states and 630 transitions. [2019-09-05 11:41:38,271 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 11:41:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 630 transitions. [2019-09-05 11:41:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2019-09-05 11:41:38,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:41:38,276 INFO L399 BasicCegarLoop]: trace histogram [260, 260, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:41:38,276 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:41:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:41:38,276 INFO L82 PathProgramCache]: Analyzing trace with hash -675411522, now seen corresponding path program 13 times [2019-09-05 11:41:38,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:41:38,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:41:38,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:38,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:41:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:41:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 73245 backedges. 6964 proven. 169 refuted. 0 times theorem prover too weak. 66112 trivial. 0 not checked. [2019-09-05 11:41:40,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:41:40,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:41:40,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:41:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:41:40,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-05 11:41:40,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:41:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 73245 backedges. 23529 proven. 2303 refuted. 0 times theorem prover too weak. 47413 trivial. 0 not checked. [2019-09-05 11:41:40,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:41:40,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-09-05 11:41:40,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 11:41:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 11:41:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2019-09-05 11:41:40,929 INFO L87 Difference]: Start difference. First operand 605 states and 630 transitions. Second operand 26 states. [2019-09-05 11:41:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:41:44,698 INFO L93 Difference]: Finished difference Result 1550 states and 1644 transitions. [2019-09-05 11:41:44,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-05 11:41:44,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 604 [2019-09-05 11:41:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:41:44,703 INFO L225 Difference]: With dead ends: 1550 [2019-09-05 11:41:44,703 INFO L226 Difference]: Without dead ends: 980 [2019-09-05 11:41:44,708 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=7728, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 11:41:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2019-09-05 11:41:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 800. [2019-09-05 11:41:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2019-09-05 11:41:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 830 transitions. [2019-09-05 11:41:44,758 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 830 transitions. Word has length 604 [2019-09-05 11:41:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:41:44,759 INFO L475 AbstractCegarLoop]: Abstraction has 800 states and 830 transitions. [2019-09-05 11:41:44,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 11:41:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 830 transitions. [2019-09-05 11:41:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2019-09-05 11:41:44,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:41:44,774 INFO L399 BasicCegarLoop]: trace histogram [350, 350, 25, 25, 25, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:41:44,774 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:41:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:41:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1613923331, now seen corresponding path program 14 times [2019-09-05 11:41:44,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:41:44,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:41:44,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:44,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:41:44,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:41:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 131960 backedges. 10138 proven. 196 refuted. 0 times theorem prover too weak. 121626 trivial. 0 not checked. [2019-09-05 11:41:47,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:41:47,506 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:41:47,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:41:48,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:41:48,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:41:48,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-05 11:41:48,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:41:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 131960 backedges. 42349 proven. 4359 refuted. 0 times theorem prover too weak. 85252 trivial. 0 not checked. [2019-09-05 11:41:48,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:41:48,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-09-05 11:41:48,684 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-05 11:41:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-05 11:41:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2019-09-05 11:41:48,685 INFO L87 Difference]: Start difference. First operand 800 states and 830 transitions. Second operand 29 states. [2019-09-05 11:41:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:41:53,895 INFO L93 Difference]: Finished difference Result 1973 states and 2082 transitions. [2019-09-05 11:41:53,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-09-05 11:41:53,896 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 799 [2019-09-05 11:41:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:41:53,901 INFO L225 Difference]: With dead ends: 1973 [2019-09-05 11:41:53,901 INFO L226 Difference]: Without dead ends: 1210 [2019-09-05 11:41:53,908 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=12071, Unknown=0, NotChecked=0, Total=12656 [2019-09-05 11:41:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2019-09-05 11:41:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1015. [2019-09-05 11:41:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-09-05 11:41:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1050 transitions. [2019-09-05 11:41:53,959 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1050 transitions. Word has length 799 [2019-09-05 11:41:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:41:53,959 INFO L475 AbstractCegarLoop]: Abstraction has 1015 states and 1050 transitions. [2019-09-05 11:41:53,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-05 11:41:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1050 transitions. [2019-09-05 11:41:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2019-09-05 11:41:53,971 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:41:53,971 INFO L399 BasicCegarLoop]: trace histogram [450, 450, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:41:53,971 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:41:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:41:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1388522274, now seen corresponding path program 15 times [2019-09-05 11:41:53,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:41:53,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:41:53,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:53,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:41:53,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:41:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:41:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 217040 backedges. 13988 proven. 225 refuted. 0 times theorem prover too weak. 202827 trivial. 0 not checked. [2019-09-05 11:41:57,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:41:57,563 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:41:57,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000