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/recursive-simple/fibo_2calls_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:25:21,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:25:21,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:25:21,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:25:21,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:25:21,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:25:21,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:25:21,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:25:21,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:25:21,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:25:21,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:25:21,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:25:21,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:25:21,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:25:21,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:25:21,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:25:21,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:25:21,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:25:21,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:25:21,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:25:21,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:25:21,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:25:21,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:25:21,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:25:21,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:25:21,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:25:21,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:25:21,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:25:21,233 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 [2019-09-08 06:25:21,260 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:25:21,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:25:21,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:25:21,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:25:21,262 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:25:21,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:25:21,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:25:21,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:25:21,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:25:21,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:25:21,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:25:21,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:25:21,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:25:21,265 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:25:21,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:25:21,266 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:25:21,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:25:21,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:25:21,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:25:21,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:25:21,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:25:21,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:25:21,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:25:21,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:25:21,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:25:21,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:25:21,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:25:21,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:25:21,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:25:21,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:25:21,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:25:21,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:25:21,350 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:25:21,350 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:25:21,351 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2019-09-08 06:25:21,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab4ef6e5/066f7132b9f2492f9f13b875f223a8c4/FLAGd2f2805cc [2019-09-08 06:25:21,892 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:25:21,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2019-09-08 06:25:21,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab4ef6e5/066f7132b9f2492f9f13b875f223a8c4/FLAGd2f2805cc [2019-09-08 06:25:22,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab4ef6e5/066f7132b9f2492f9f13b875f223a8c4 [2019-09-08 06:25:22,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:25:22,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:25:22,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:25:22,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:25:22,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:25:22,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1896e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22, skipping insertion in model container [2019-09-08 06:25:22,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,319 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:25:22,342 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:25:22,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:25:22,515 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:25:22,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:25:22,548 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:25:22,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22 WrapperNode [2019-09-08 06:25:22,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:25:22,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:25:22,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:25:22,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:25:22,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... [2019-09-08 06:25:22,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:25:22,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:25:22,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:25:22,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:25:22,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:25:22,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:25:22,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:25:22,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:25:22,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:25:22,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:25:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:25:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:25:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:25:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:25:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:25:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:25:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:25:22,993 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:25:22,994 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:25:22,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:25:22 BoogieIcfgContainer [2019-09-08 06:25:22,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:25:23,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:25:23,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:25:23,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:25:23,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:25:22" (1/3) ... [2019-09-08 06:25:23,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d4926f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:25:23, skipping insertion in model container [2019-09-08 06:25:23,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:25:22" (2/3) ... [2019-09-08 06:25:23,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d4926f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:25:23, skipping insertion in model container [2019-09-08 06:25:23,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:25:22" (3/3) ... [2019-09-08 06:25:23,028 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2019-09-08 06:25:23,056 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:25:23,073 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:25:23,094 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:25:23,126 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:25:23,127 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:25:23,127 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:25:23,127 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:25:23,127 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:25:23,127 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:25:23,128 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:25:23,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:25:23,128 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:25:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:25:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:25:23,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:23,159 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:23,162 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:25:23,169 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:23,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:23,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:23,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:25:23,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:25:23,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:25:23,355 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:25:23,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:25:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:25:23,379 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:25:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:23,559 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:25:23,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:25:23,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:25:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:23,577 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:25:23,577 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:25:23,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:25:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:25:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:25:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:25:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:25:23,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:25:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:23,662 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:25:23,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:25:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:25:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:25:23,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:23,669 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:23,670 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:25:23,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:23,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:23,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:23,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:25:23,751 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:25:23,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:25:23,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:25:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:25:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:25:23,755 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:25:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:23,789 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:25:23,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:25:23,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:25:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:23,792 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:25:23,792 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:25:23,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:25:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:25:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:25:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:25:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:25:23,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:25:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:23,807 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:25:23,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:25:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:25:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:25:23,809 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:23,809 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:23,810 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:25:23,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:23,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:23,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:23,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:25:23,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:23,916 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:23,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:23,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:25:23,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:25:24,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:24,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:25:24,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:25:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:25:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:25:24,100 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:25:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:24,357 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:25:24,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:25:24,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:25:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:24,360 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:25:24,360 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:25:24,362 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:25:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:25:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:25:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:25:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:25:24,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:25:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:24,372 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:25:24,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:25:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:25:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:25:24,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:24,375 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:24,375 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:24,376 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:25:24,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:24,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:24,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:24,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:24,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:25:24,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:24,465 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) [2019-09-08 06:25:24,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:24,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:25:24,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:25:24,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:24,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:25:24,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:25:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:25:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:25:24,560 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:25:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:24,678 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:25:24,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:25:24,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:25:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:24,681 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:25:24,681 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:25:24,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:25:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:25:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:25:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:25:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:25:24,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:25:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:24,692 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:25:24,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:25:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:25:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:25:24,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:24,694 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:24,695 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:25:24,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:24,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:24,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:24,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:24,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:25:24,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:24,773 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) [2019-09-08 06:25:24,791 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 [2019-09-08 06:25:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:24,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:25:24,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:25:24,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:24,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:25:24,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:25:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:25:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:25:24,882 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:25:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:25,139 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:25:25,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:25:25,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:25:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:25,142 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:25:25,142 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:25:25,148 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:25:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:25:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:25:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:25:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:25:25,166 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:25:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:25,167 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:25:25,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:25:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:25:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:25:25,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:25,169 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:25,170 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:25:25,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:25,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:25,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:25,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:25,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:25:25,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:25,348 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) [2019-09-08 06:25:25,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:25,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:25:25,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:25:25,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:25,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:25:25,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:25:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:25:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:25:25,503 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:25:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:26,078 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:25:26,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:25:26,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:25:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:26,083 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:25:26,084 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:25:26,086 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:25:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:25:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:25:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:25:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:25:26,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:25:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:26,114 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:25:26,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:25:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:25:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:25:26,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:26,122 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:26,122 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:25:26,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:26,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:26,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:25:26,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:26,197 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 [2019-09-08 06:25:26,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:26,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:25:26,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:25:26,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:26,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:25:26,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:25:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:25:26,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:25:26,339 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:25:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:26,560 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:25:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:25:26,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:25:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:26,564 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:25:26,564 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:25:26,565 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:25:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:25:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:25:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:25:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:25:26,586 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:25:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:26,587 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:25:26,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:25:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:25:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 06:25:26,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:26,592 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:26,595 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 1 times [2019-09-08 06:25:26,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:26,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:26,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:26,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:26,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-08 06:25:26,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:26,799 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:26,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:26,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:25:26,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-09-08 06:25:26,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:26,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 06:25:26,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:25:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:25:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:25:26,999 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 11 states. [2019-09-08 06:25:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:27,198 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2019-09-08 06:25:27,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:25:27,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2019-09-08 06:25:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:27,202 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:25:27,202 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:25:27,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:25:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:25:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2019-09-08 06:25:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:25:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:25:27,233 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 110 [2019-09-08 06:25:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:27,234 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:25:27,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:25:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:25:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:25:27,239 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:27,239 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:27,239 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:27,240 INFO L82 PathProgramCache]: Analyzing trace with hash -839499894, now seen corresponding path program 1 times [2019-09-08 06:25:27,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:27,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:27,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:27,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:27,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 78 proven. 75 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2019-09-08 06:25:27,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:27,386 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:27,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:27,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:25:27,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 35 proven. 170 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-08 06:25:27,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:27,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2019-09-08 06:25:27,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:25:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:25:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:25:27,584 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 13 states. [2019-09-08 06:25:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:27,979 INFO L93 Difference]: Finished difference Result 136 states and 325 transitions. [2019-09-08 06:25:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:25:27,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2019-09-08 06:25:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:27,983 INFO L225 Difference]: With dead ends: 136 [2019-09-08 06:25:27,984 INFO L226 Difference]: Without dead ends: 132 [2019-09-08 06:25:27,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:25:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-08 06:25:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 77. [2019-09-08 06:25:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 06:25:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2019-09-08 06:25:28,015 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 135 [2019-09-08 06:25:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:28,019 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2019-09-08 06:25:28,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:25:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2019-09-08 06:25:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-08 06:25:28,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:28,030 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 16, 13, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:28,030 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -869629278, now seen corresponding path program 2 times [2019-09-08 06:25:28,031 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:28,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:28,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:28,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:28,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 135 proven. 288 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2019-09-08 06:25:28,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:28,346 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 [2019-09-08 06:25:28,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:25:28,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:25:28,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:28,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:25:28,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 73 proven. 533 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:25:28,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:28,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2019-09-08 06:25:28,652 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:25:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:25:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:25:28,653 INFO L87 Difference]: Start difference. First operand 77 states and 138 transitions. Second operand 18 states. [2019-09-08 06:25:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:29,339 INFO L93 Difference]: Finished difference Result 245 states and 622 transitions. [2019-09-08 06:25:29,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:25:29,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 270 [2019-09-08 06:25:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:29,344 INFO L225 Difference]: With dead ends: 245 [2019-09-08 06:25:29,345 INFO L226 Difference]: Without dead ends: 174 [2019-09-08 06:25:29,349 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:25:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-08 06:25:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2019-09-08 06:25:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-08 06:25:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-09-08 06:25:29,373 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 270 [2019-09-08 06:25:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:29,374 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-09-08 06:25:29,374 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:25:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-09-08 06:25:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2019-09-08 06:25:29,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:29,382 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 24, 23, 23, 21, 15, 15, 15, 15, 15, 15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:29,383 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:29,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1246738503, now seen corresponding path program 3 times [2019-09-08 06:25:29,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:29,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:29,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:29,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:29,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3878 backedges. 313 proven. 434 refuted. 0 times theorem prover too weak. 3131 trivial. 0 not checked. [2019-09-08 06:25:29,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:29,666 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) [2019-09-08 06:25:29,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:29,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:25:29,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:29,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:25:29,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3878 backedges. 873 proven. 7 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2019-09-08 06:25:29,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:29,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-09-08 06:25:29,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:25:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:25:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:25:29,935 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 13 states. [2019-09-08 06:25:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:30,199 INFO L93 Difference]: Finished difference Result 321 states and 680 transitions. [2019-09-08 06:25:30,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:25:30,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 370 [2019-09-08 06:25:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:30,204 INFO L225 Difference]: With dead ends: 321 [2019-09-08 06:25:30,205 INFO L226 Difference]: Without dead ends: 130 [2019-09-08 06:25:30,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:25:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-08 06:25:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2019-09-08 06:25:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-08 06:25:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 226 transitions. [2019-09-08 06:25:30,236 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 226 transitions. Word has length 370 [2019-09-08 06:25:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:30,237 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 226 transitions. [2019-09-08 06:25:30,237 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:25:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 226 transitions. [2019-09-08 06:25:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2019-09-08 06:25:30,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:30,248 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 30, 28, 28, 22, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:30,248 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1172649878, now seen corresponding path program 4 times [2019-09-08 06:25:30,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:30,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:30,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:30,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:30,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4822 backedges. 192 proven. 683 refuted. 0 times theorem prover too weak. 3947 trivial. 0 not checked. [2019-09-08 06:25:30,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:30,631 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:30,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:25:30,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:25:30,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:30,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:25:30,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4822 backedges. 1521 proven. 32 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2019-09-08 06:25:30,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:30,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2019-09-08 06:25:30,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:25:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:25:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:25:30,998 INFO L87 Difference]: Start difference. First operand 128 states and 226 transitions. Second operand 17 states. [2019-09-08 06:25:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:31,836 INFO L93 Difference]: Finished difference Result 344 states and 820 transitions. [2019-09-08 06:25:31,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:25:31,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 413 [2019-09-08 06:25:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:31,843 INFO L225 Difference]: With dead ends: 344 [2019-09-08 06:25:31,843 INFO L226 Difference]: Without dead ends: 216 [2019-09-08 06:25:31,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:25:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-09-08 06:25:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 182. [2019-09-08 06:25:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-09-08 06:25:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 348 transitions. [2019-09-08 06:25:31,874 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 348 transitions. Word has length 413 [2019-09-08 06:25:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:31,874 INFO L475 AbstractCegarLoop]: Abstraction has 182 states and 348 transitions. [2019-09-08 06:25:31,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:25:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 348 transitions. [2019-09-08 06:25:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-09-08 06:25:31,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:31,882 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 32, 32, 30, 28, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 14, 9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:31,882 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:31,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:31,883 INFO L82 PathProgramCache]: Analyzing trace with hash 794398788, now seen corresponding path program 5 times [2019-09-08 06:25:31,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:31,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:31,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:31,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:31,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6925 backedges. 204 proven. 1040 refuted. 0 times theorem prover too weak. 5681 trivial. 0 not checked. [2019-09-08 06:25:32,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:32,356 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:32,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:25:32,465 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-08 06:25:32,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:32,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-08 06:25:32,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6925 backedges. 3589 proven. 35 refuted. 0 times theorem prover too weak. 3301 trivial. 0 not checked. [2019-09-08 06:25:32,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:32,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-09-08 06:25:32,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:25:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:25:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:25:32,797 INFO L87 Difference]: Start difference. First operand 182 states and 348 transitions. Second operand 20 states. [2019-09-08 06:25:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:33,892 INFO L93 Difference]: Finished difference Result 479 states and 1156 transitions. [2019-09-08 06:25:33,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:25:33,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 491 [2019-09-08 06:25:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:33,898 INFO L225 Difference]: With dead ends: 479 [2019-09-08 06:25:33,898 INFO L226 Difference]: Without dead ends: 292 [2019-09-08 06:25:33,902 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 06:25:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-09-08 06:25:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 240. [2019-09-08 06:25:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-09-08 06:25:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 498 transitions. [2019-09-08 06:25:33,937 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 498 transitions. Word has length 491 [2019-09-08 06:25:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:33,938 INFO L475 AbstractCegarLoop]: Abstraction has 240 states and 498 transitions. [2019-09-08 06:25:33,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:25:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 498 transitions. [2019-09-08 06:25:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2019-09-08 06:25:33,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:33,948 INFO L399 BasicCegarLoop]: trace histogram [43, 43, 40, 40, 35, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 13, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:33,948 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash -996800280, now seen corresponding path program 6 times [2019-09-08 06:25:33,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:33,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:33,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:33,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:33,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9455 backedges. 286 proven. 1377 refuted. 0 times theorem prover too weak. 7792 trivial. 0 not checked. [2019-09-08 06:25:34,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:34,460 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) [2019-09-08 06:25:34,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:34,580 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-08 06:25:34,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:34,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:25:34,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9455 backedges. 1633 proven. 4 refuted. 0 times theorem prover too weak. 7818 trivial. 0 not checked. [2019-09-08 06:25:34,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:34,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2019-09-08 06:25:34,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:25:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:25:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:25:34,977 INFO L87 Difference]: Start difference. First operand 240 states and 498 transitions. Second operand 16 states. [2019-09-08 06:25:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:35,555 INFO L93 Difference]: Finished difference Result 549 states and 1444 transitions. [2019-09-08 06:25:35,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:25:35,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 573 [2019-09-08 06:25:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:35,565 INFO L225 Difference]: With dead ends: 549 [2019-09-08 06:25:35,566 INFO L226 Difference]: Without dead ends: 322 [2019-09-08 06:25:35,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:25:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-09-08 06:25:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 275. [2019-09-08 06:25:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2019-09-08 06:25:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 620 transitions. [2019-09-08 06:25:35,615 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 620 transitions. Word has length 573 [2019-09-08 06:25:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:35,616 INFO L475 AbstractCegarLoop]: Abstraction has 275 states and 620 transitions. [2019-09-08 06:25:35,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:25:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 620 transitions. [2019-09-08 06:25:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2019-09-08 06:25:35,636 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:35,637 INFO L399 BasicCegarLoop]: trace histogram [85, 85, 74, 74, 63, 63, 42, 42, 42, 42, 42, 42, 42, 37, 37, 37, 37, 37, 37, 37, 26, 22, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:35,638 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash -263559478, now seen corresponding path program 7 times [2019-09-08 06:25:35,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:35,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:35,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:35,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:35,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 35098 backedges. 445 proven. 2494 refuted. 0 times theorem prover too weak. 32159 trivial. 0 not checked. [2019-09-08 06:25:36,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:36,568 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:36,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:36,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 2416 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:25:36,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 35098 backedges. 386 proven. 3384 refuted. 0 times theorem prover too weak. 31328 trivial. 0 not checked. [2019-09-08 06:25:38,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:38,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2019-09-08 06:25:38,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:25:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:25:38,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:25:38,061 INFO L87 Difference]: Start difference. First operand 275 states and 620 transitions. Second operand 19 states. [2019-09-08 06:25:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:38,650 INFO L93 Difference]: Finished difference Result 392 states and 1145 transitions. [2019-09-08 06:25:38,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:25:38,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1087 [2019-09-08 06:25:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:38,664 INFO L225 Difference]: With dead ends: 392 [2019-09-08 06:25:38,665 INFO L226 Difference]: Without dead ends: 388 [2019-09-08 06:25:38,667 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1117 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:25:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-09-08 06:25:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 328. [2019-09-08 06:25:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-09-08 06:25:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 874 transitions. [2019-09-08 06:25:38,722 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 874 transitions. Word has length 1087 [2019-09-08 06:25:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:38,723 INFO L475 AbstractCegarLoop]: Abstraction has 328 states and 874 transitions. [2019-09-08 06:25:38,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:25:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 874 transitions. [2019-09-08 06:25:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1602 [2019-09-08 06:25:38,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:38,758 INFO L399 BasicCegarLoop]: trace histogram [130, 130, 105, 105, 94, 90, 65, 65, 65, 65, 65, 65, 65, 52, 52, 52, 52, 52, 52, 52, 42, 36, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:38,758 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -993088750, now seen corresponding path program 8 times [2019-09-08 06:25:38,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:38,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:38,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 77380 backedges. 722 proven. 4321 refuted. 0 times theorem prover too weak. 72337 trivial. 0 not checked. [2019-09-08 06:25:40,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:40,516 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:40,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:25:40,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:25:40,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:40,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 3558 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:25:41,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 77380 backedges. 658 proven. 5643 refuted. 0 times theorem prover too weak. 71079 trivial. 0 not checked. [2019-09-08 06:25:42,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:42,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2019-09-08 06:25:42,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:25:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:25:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:25:42,335 INFO L87 Difference]: Start difference. First operand 328 states and 874 transitions. Second operand 21 states. [2019-09-08 06:25:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:42,914 INFO L93 Difference]: Finished difference Result 434 states and 1430 transitions. [2019-09-08 06:25:42,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:25:42,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1601 [2019-09-08 06:25:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:42,936 INFO L225 Difference]: With dead ends: 434 [2019-09-08 06:25:42,937 INFO L226 Difference]: Without dead ends: 430 [2019-09-08 06:25:42,940 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1600 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:25:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-09-08 06:25:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 322. [2019-09-08 06:25:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2019-09-08 06:25:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 835 transitions. [2019-09-08 06:25:43,010 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 835 transitions. Word has length 1601 [2019-09-08 06:25:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:43,013 INFO L475 AbstractCegarLoop]: Abstraction has 322 states and 835 transitions. [2019-09-08 06:25:43,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:25:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 835 transitions. [2019-09-08 06:25:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2913 [2019-09-08 06:25:43,133 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:43,135 INFO L399 BasicCegarLoop]: trace histogram [221, 221, 206, 206, 175, 168, 110, 110, 110, 110, 110, 110, 110, 103, 103, 103, 103, 103, 103, 103, 72, 58, 46, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:43,135 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:43,136 INFO L82 PathProgramCache]: Analyzing trace with hash -226541474, now seen corresponding path program 9 times [2019-09-08 06:25:43,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:43,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 255945 backedges. 1334 proven. 7726 refuted. 0 times theorem prover too weak. 246885 trivial. 0 not checked. [2019-09-08 06:25:47,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:47,743 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:47,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:25:47,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 06:25:47,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:47,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:25:48,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 255945 backedges. 25631 proven. 34 refuted. 0 times theorem prover too weak. 230280 trivial. 0 not checked. [2019-09-08 06:25:51,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:51,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2019-09-08 06:25:51,342 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:25:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:25:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:25:51,343 INFO L87 Difference]: Start difference. First operand 322 states and 835 transitions. Second operand 18 states. [2019-09-08 06:25:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:51,928 INFO L93 Difference]: Finished difference Result 644 states and 1891 transitions. [2019-09-08 06:25:51,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:25:51,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 2912 [2019-09-08 06:25:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:51,937 INFO L225 Difference]: With dead ends: 644 [2019-09-08 06:25:51,938 INFO L226 Difference]: Without dead ends: 325 [2019-09-08 06:25:51,947 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2906 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:25:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-09-08 06:25:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 308. [2019-09-08 06:25:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2019-09-08 06:25:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 673 transitions. [2019-09-08 06:25:51,991 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 673 transitions. Word has length 2912 [2019-09-08 06:25:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:51,992 INFO L475 AbstractCegarLoop]: Abstraction has 308 states and 673 transitions. [2019-09-08 06:25:51,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:25:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 673 transitions. [2019-09-08 06:25:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3249 [2019-09-08 06:25:52,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:52,106 INFO L399 BasicCegarLoop]: trace histogram [249, 249, 228, 228, 190, 189, 124, 124, 124, 124, 124, 124, 124, 114, 114, 114, 114, 114, 114, 114, 75, 66, 60, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:52,107 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1225564325, now seen corresponding path program 10 times [2019-09-08 06:25:52,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:52,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:52,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:52,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:52,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 319005 backedges. 1412 proven. 10348 refuted. 0 times theorem prover too weak. 307245 trivial. 0 not checked. [2019-09-08 06:25:57,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:57,969 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:57,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:25:58,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:25:58,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:58,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 5779 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:25:58,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 319005 backedges. 20628 proven. 56 refuted. 0 times theorem prover too weak. 298321 trivial. 0 not checked. [2019-09-08 06:26:02,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:02,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2019-09-08 06:26:02,904 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:26:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:26:02,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:26:02,905 INFO L87 Difference]: Start difference. First operand 308 states and 673 transitions. Second operand 21 states. [2019-09-08 06:26:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:04,522 INFO L93 Difference]: Finished difference Result 753 states and 1957 transitions. [2019-09-08 06:26:04,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 06:26:04,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 3248 [2019-09-08 06:26:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:04,533 INFO L225 Difference]: With dead ends: 753 [2019-09-08 06:26:04,533 INFO L226 Difference]: Without dead ends: 448 [2019-09-08 06:26:04,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3300 GetRequests, 3249 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=2329, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 06:26:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-09-08 06:26:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 420. [2019-09-08 06:26:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-08 06:26:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 935 transitions. [2019-09-08 06:26:04,611 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 935 transitions. Word has length 3248 [2019-09-08 06:26:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:04,613 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 935 transitions. [2019-09-08 06:26:04,613 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:26:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 935 transitions. [2019-09-08 06:26:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2369 [2019-09-08 06:26:04,702 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:04,704 INFO L399 BasicCegarLoop]: trace histogram [174, 174, 173, 173, 144, 135, 87, 87, 87, 87, 87, 87, 87, 86, 86, 86, 86, 86, 86, 86, 58, 48, 38, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:04,705 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash 483728560, now seen corresponding path program 11 times [2019-09-08 06:26:04,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:04,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:04,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:04,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:04,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 168641 backedges. 1276 proven. 7202 refuted. 0 times theorem prover too weak. 160163 trivial. 0 not checked. [2019-09-08 06:26:08,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:08,543 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:08,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:26:08,888 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-08 06:26:08,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:08,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:26:08,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 168641 backedges. 78330 proven. 875 refuted. 0 times theorem prover too weak. 89436 trivial. 0 not checked. [2019-09-08 06:26:11,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:11,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 26 [2019-09-08 06:26:11,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:26:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:26:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:26:11,772 INFO L87 Difference]: Start difference. First operand 420 states and 935 transitions. Second operand 26 states. [2019-09-08 06:26:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:14,019 INFO L93 Difference]: Finished difference Result 887 states and 2396 transitions. [2019-09-08 06:26:14,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-08 06:26:14,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 2368 [2019-09-08 06:26:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:14,029 INFO L225 Difference]: With dead ends: 887 [2019-09-08 06:26:14,030 INFO L226 Difference]: Without dead ends: 464 [2019-09-08 06:26:14,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2431 GetRequests, 2364 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=641, Invalid=4051, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 06:26:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-09-08 06:26:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 326. [2019-09-08 06:26:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2019-09-08 06:26:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 622 transitions. [2019-09-08 06:26:14,086 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 622 transitions. Word has length 2368 [2019-09-08 06:26:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:14,087 INFO L475 AbstractCegarLoop]: Abstraction has 326 states and 622 transitions. [2019-09-08 06:26:14,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:26:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 622 transitions. [2019-09-08 06:26:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3624 [2019-09-08 06:26:14,223 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:14,225 INFO L399 BasicCegarLoop]: trace histogram [270, 270, 261, 261, 219, 211, 135, 135, 135, 135, 135, 135, 135, 130, 130, 130, 130, 130, 130, 130, 89, 76, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:14,225 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1458041472, now seen corresponding path program 12 times [2019-09-08 06:26:14,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:14,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:14,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:14,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:14,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 396726 backedges. 4310 proven. 13621 refuted. 0 times theorem prover too weak. 378795 trivial. 0 not checked. [2019-09-08 06:26:24,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:24,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:24,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:26:25,040 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-09-08 06:26:25,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:25,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:26:25,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 396726 backedges. 2689 proven. 14892 refuted. 0 times theorem prover too weak. 379145 trivial. 0 not checked. [2019-09-08 06:26:32,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:32,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 32 [2019-09-08 06:26:32,205 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 06:26:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 06:26:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:26:32,206 INFO L87 Difference]: Start difference. First operand 326 states and 622 transitions. Second operand 32 states. [2019-09-08 06:26:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:36,060 INFO L93 Difference]: Finished difference Result 785 states and 2033 transitions. [2019-09-08 06:26:36,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 06:26:36,061 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3623 [2019-09-08 06:26:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:36,076 INFO L225 Difference]: With dead ends: 785 [2019-09-08 06:26:36,076 INFO L226 Difference]: Without dead ends: 476 [2019-09-08 06:26:36,090 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3709 GetRequests, 3619 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1013, Invalid=7359, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 06:26:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2019-09-08 06:26:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2019-09-08 06:26:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-09-08 06:26:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 593 transitions. [2019-09-08 06:26:36,154 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 593 transitions. Word has length 3623 [2019-09-08 06:26:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:36,157 INFO L475 AbstractCegarLoop]: Abstraction has 353 states and 593 transitions. [2019-09-08 06:26:36,157 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 06:26:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 593 transitions. [2019-09-08 06:26:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6877 [2019-09-08 06:26:37,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:37,031 INFO L399 BasicCegarLoop]: trace histogram [508, 508, 501, 501, 411, 404, 254, 254, 254, 254, 254, 254, 254, 250, 250, 250, 250, 250, 250, 250, 157, 154, 104, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:37,031 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1172647715, now seen corresponding path program 13 times [2019-09-08 06:26:37,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:37,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:37,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:37,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:37,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1434797 backedges. 21282 proven. 22845 refuted. 0 times theorem prover too weak. 1390670 trivial. 0 not checked. [2019-09-08 06:27:01,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:01,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:01,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:03,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 15269 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:27:03,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1434797 backedges. 3965 proven. 32631 refuted. 0 times theorem prover too weak. 1398201 trivial. 0 not checked. [2019-09-08 06:27:21,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:21,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 36 [2019-09-08 06:27:21,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:27:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:27:21,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:27:21,446 INFO L87 Difference]: Start difference. First operand 353 states and 593 transitions. Second operand 36 states. [2019-09-08 06:27:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:25,770 INFO L93 Difference]: Finished difference Result 1262 states and 2868 transitions. [2019-09-08 06:27:25,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-09-08 06:27:25,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 6876 [2019-09-08 06:27:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:25,789 INFO L225 Difference]: With dead ends: 1262 [2019-09-08 06:27:25,790 INFO L226 Difference]: Without dead ends: 823 [2019-09-08 06:27:25,802 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6992 GetRequests, 6876 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1494, Invalid=12312, Unknown=0, NotChecked=0, Total=13806 [2019-09-08 06:27:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2019-09-08 06:27:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 591. [2019-09-08 06:27:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2019-09-08 06:27:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1025 transitions. [2019-09-08 06:27:25,880 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1025 transitions. Word has length 6876 [2019-09-08 06:27:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:25,882 INFO L475 AbstractCegarLoop]: Abstraction has 591 states and 1025 transitions. [2019-09-08 06:27:25,882 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:27:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1025 transitions. [2019-09-08 06:27:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9847 [2019-09-08 06:27:26,625 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:26,629 INFO L399 BasicCegarLoop]: trace histogram [727, 727, 718, 718, 590, 579, 363, 363, 363, 363, 363, 363, 363, 359, 359, 359, 359, 359, 359, 359, 231, 216, 139, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:26,629 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:26,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1215814615, now seen corresponding path program 14 times [2019-09-08 06:27:26,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:26,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:26,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2946158 backedges. 24967 proven. 36874 refuted. 0 times theorem prover too weak. 2884317 trivial. 0 not checked. [2019-09-08 06:28:20,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:20,591 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:20,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:28:23,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:28:23,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:23,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 21863 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:28:24,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2946158 backedges. 5496 proven. 51256 refuted. 0 times theorem prover too weak. 2889406 trivial. 0 not checked. [2019-09-08 06:28:58,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:58,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 36 [2019-09-08 06:28:58,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:28:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:28:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:28:58,376 INFO L87 Difference]: Start difference. First operand 591 states and 1025 transitions. Second operand 36 states. [2019-09-08 06:29:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:02,054 INFO L93 Difference]: Finished difference Result 1525 states and 3300 transitions. [2019-09-08 06:29:02,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-09-08 06:29:02,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 9846 [2019-09-08 06:29:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:02,074 INFO L225 Difference]: With dead ends: 1525 [2019-09-08 06:29:02,075 INFO L226 Difference]: Without dead ends: 934 [2019-09-08 06:29:02,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9961 GetRequests, 9844 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4566 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1636, Invalid=12406, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:29:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2019-09-08 06:29:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 702. [2019-09-08 06:29:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-09-08 06:29:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2019-09-08 06:29:02,159 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 9846 [2019-09-08 06:29:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:02,162 INFO L475 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2019-09-08 06:29:02,162 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:29:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2019-09-08 06:29:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13876 [2019-09-08 06:29:03,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:03,205 INFO L399 BasicCegarLoop]: trace histogram [1022, 1022, 1015, 1015, 825, 821, 511, 511, 511, 511, 511, 511, 511, 507, 507, 507, 507, 507, 507, 507, 318, 310, 197, 194, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:29:03,205 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1455889399, now seen corresponding path program 15 times [2019-09-08 06:29:03,208 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:03,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:03,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:03,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:29:03,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:30:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5856158 backedges. 21941 proven. 57227 refuted. 0 times theorem prover too weak. 5776990 trivial. 0 not checked. [2019-09-08 06:30:31,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:30:31,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:30:31,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:30:31,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-09-08 06:30:31,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:30:32,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:30:32,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:31:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5856158 backedges. 191933 proven. 145 refuted. 0 times theorem prover too weak. 5664080 trivial. 0 not checked. [2019-09-08 06:31:34,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:31:34,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 30 [2019-09-08 06:31:34,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 06:31:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 06:31:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:31:34,347 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand 30 states. [2019-09-08 06:31:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:31:36,888 INFO L93 Difference]: Finished difference Result 1536 states and 2967 transitions. [2019-09-08 06:31:36,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 06:31:36,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 13875 [2019-09-08 06:31:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:31:36,900 INFO L225 Difference]: With dead ends: 1536 [2019-09-08 06:31:36,901 INFO L226 Difference]: Without dead ends: 795 [2019-09-08 06:31:36,910 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13952 GetRequests, 13875 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=5403, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 06:31:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-09-08 06:31:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 661. [2019-09-08 06:31:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-09-08 06:31:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1057 transitions. [2019-09-08 06:31:36,970 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1057 transitions. Word has length 13875 [2019-09-08 06:31:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:31:36,973 INFO L475 AbstractCegarLoop]: Abstraction has 661 states and 1057 transitions. [2019-09-08 06:31:36,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 06:31:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1057 transitions. [2019-09-08 06:31:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11944 [2019-09-08 06:31:37,987 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:31:37,990 INFO L399 BasicCegarLoop]: trace histogram [877, 877, 876, 876, 709, 709, 438, 438, 438, 438, 438, 438, 438, 438, 438, 438, 438, 438, 438, 438, 271, 271, 168, 167, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:31:37,991 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:31:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:31:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 714692237, now seen corresponding path program 16 times [2019-09-08 06:31:37,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:31:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:31:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:37,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:31:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:32:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4337100 backedges. 18716 proven. 45244 refuted. 0 times theorem prover too weak. 4273140 trivial. 0 not checked. [2019-09-08 06:32:43,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:32:43,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:32:43,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:32:46,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:32:46,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:32:46,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 21255 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-08 06:32:46,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:33:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4337100 backedges. 2033536 proven. 22495 refuted. 0 times theorem prover too weak. 2281069 trivial. 0 not checked. [2019-09-08 06:33:32,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:33:32,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 33 [2019-09-08 06:33:32,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 06:33:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 06:33:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:33:32,612 INFO L87 Difference]: Start difference. First operand 661 states and 1057 transitions. Second operand 33 states. [2019-09-08 06:33:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:33:37,178 INFO L93 Difference]: Finished difference Result 1452 states and 2549 transitions. [2019-09-08 06:33:37,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-08 06:33:37,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 11943 [2019-09-08 06:33:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:33:37,198 INFO L225 Difference]: With dead ends: 1452 [2019-09-08 06:33:37,199 INFO L226 Difference]: Without dead ends: 782 [2019-09-08 06:33:37,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12051 GetRequests, 11940 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1410, Invalid=11246, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 06:33:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2019-09-08 06:33:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 533. [2019-09-08 06:33:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2019-09-08 06:33:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 804 transitions. [2019-09-08 06:33:37,265 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 804 transitions. Word has length 11943 [2019-09-08 06:33:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:33:37,269 INFO L475 AbstractCegarLoop]: Abstraction has 533 states and 804 transitions. [2019-09-08 06:33:37,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 06:33:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 804 transitions. [2019-09-08 06:33:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11481 [2019-09-08 06:33:38,270 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:33:38,273 INFO L399 BasicCegarLoop]: trace histogram [844, 844, 841, 841, 682, 681, 422, 422, 422, 422, 422, 422, 422, 420, 420, 420, 420, 420, 420, 420, 261, 260, 163, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:33:38,273 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:33:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:33:38,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1824277677, now seen corresponding path program 17 times [2019-09-08 06:33:38,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:33:38,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:33:38,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:33:38,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:33:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:34:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:34:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4006909 backedges. 31789 proven. 24850 refuted. 0 times theorem prover too weak. 3950270 trivial. 0 not checked. [2019-09-08 06:34:46,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:34:46,884 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:34:46,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:36:37,464 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 701 check-sat command(s) [2019-09-08 06:36:37,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:36:37,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 25054 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-08 06:36:37,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:37:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4006909 backedges. 2008499 proven. 29729 refuted. 0 times theorem prover too weak. 1968681 trivial. 0 not checked. [2019-09-08 06:37:20,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:37:20,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 41 [2019-09-08 06:37:20,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 06:37:20,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 06:37:20,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 06:37:20,979 INFO L87 Difference]: Start difference. First operand 533 states and 804 transitions. Second operand 41 states. [2019-09-08 06:37:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:37:24,629 INFO L93 Difference]: Finished difference Result 1336 states and 2345 transitions. [2019-09-08 06:37:24,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-08 06:37:24,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 11480 [2019-09-08 06:37:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:37:24,645 INFO L225 Difference]: With dead ends: 1336 [2019-09-08 06:37:24,645 INFO L226 Difference]: Without dead ends: 820 [2019-09-08 06:37:24,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11593 GetRequests, 11467 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5582 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1681, Invalid=14575, Unknown=0, NotChecked=0, Total=16256 [2019-09-08 06:37:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-09-08 06:37:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 722. [2019-09-08 06:37:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-09-08 06:37:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1187 transitions. [2019-09-08 06:37:24,723 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1187 transitions. Word has length 11480 [2019-09-08 06:37:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:37:24,726 INFO L475 AbstractCegarLoop]: Abstraction has 722 states and 1187 transitions. [2019-09-08 06:37:24,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 06:37:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1187 transitions. [2019-09-08 06:37:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15403 [2019-09-08 06:37:26,511 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:37:26,512 INFO L399 BasicCegarLoop]: trace histogram [1131, 1131, 1130, 1130, 915, 914, 565, 565, 565, 565, 565, 565, 565, 565, 565, 565, 565, 565, 565, 565, 350, 349, 216, 216, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:37:26,512 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:37:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:37:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash -177773909, now seen corresponding path program 18 times [2019-09-08 06:37:26,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:37:26,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:37:26,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:37:26,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:37:26,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:37:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:39:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7217636 backedges. 9255 proven. 79869 refuted. 0 times theorem prover too weak. 7128512 trivial. 0 not checked. [2019-09-08 06:39:07,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:39:07,645 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:39:07,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:39:08,682 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2019-09-08 06:39:08,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:39:08,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:39:08,754 INFO L279 TraceCheckSpWp]: Computing forward predicates...