java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:19:43,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:19:43,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:19:43,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:19:43,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:19:43,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:19:43,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:19:43,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:19:43,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:19:43,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:19:43,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:19:43,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:19:43,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:19:43,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:19:43,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:19:43,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:19:43,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:19:43,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:19:43,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:19:43,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:19:43,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:19:43,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:19:43,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:19:43,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:19:43,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:19:43,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:19:43,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:19:43,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:19:43,190 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 [2019-09-03 19:19:43,209 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:19:43,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:19:43,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:19:43,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:19:43,214 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:19:43,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:19:43,214 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:19:43,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:19:43,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:19:43,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:19:43,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:19:43,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:19:43,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:19:43,216 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:19:43,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:19:43,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:19:43,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:19:43,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:19:43,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:19:43,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:19:43,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:19:43,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:43,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:19:43,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:19:43,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:19:43,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:19:43,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:19:43,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:19:43,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:19:43,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:19:43,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:19:43,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:19:43,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:19:43,283 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:19:43,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2019-09-03 19:19:43,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098c8b22/d6da7043ee374e9c90ed35166c460848/FLAGd6f164e0a [2019-09-03 19:19:43,850 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:19:43,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2019-09-03 19:19:43,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098c8b22/d6da7043ee374e9c90ed35166c460848/FLAGd6f164e0a [2019-09-03 19:19:44,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098c8b22/d6da7043ee374e9c90ed35166c460848 [2019-09-03 19:19:44,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:19:44,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:19:44,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:19:44,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:19:44,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6673eccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,250 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:19:44,264 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:19:44,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,495 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:19:44,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,652 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:19:44,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44 WrapperNode [2019-09-03 19:19:44,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:19:44,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:19:44,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:19:44,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:19:44,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:19:44,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (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 [2019-09-03 19:19:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:19:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:19:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:19:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 19:19:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-09-03 19:19:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:19:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:19:45,007 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:19:45,008 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 19:19:45,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:45 BoogieIcfgContainer [2019-09-03 19:19:45,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:19:45,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:19:45,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:19:45,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:19:45,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:19:44" (1/3) ... [2019-09-03 19:19:45,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6855b011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:45, skipping insertion in model container [2019-09-03 19:19:45,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (2/3) ... [2019-09-03 19:19:45,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6855b011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:45, skipping insertion in model container [2019-09-03 19:19:45,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:45" (3/3) ... [2019-09-03 19:19:45,034 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2019-09-03 19:19:45,055 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:19:45,074 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:19:45,105 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:19:45,136 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:19:45,137 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:19:45,137 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:19:45,137 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:19:45,137 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:19:45,138 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:19:45,138 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:19:45,138 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:19:45,138 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:19:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 19:19:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-03 19:19:45,157 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,158 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,160 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-09-03 19:19:45,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:19:45,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:19:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:19:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:45,330 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-03 19:19:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,347 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-09-03 19:19:45,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:19:45,348 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-09-03 19:19:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,356 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:19:45,357 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 19:19:45,360 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 19:19:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 19:19:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 19:19:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-09-03 19:19:45,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-09-03 19:19:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,401 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-09-03 19:19:45,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:19:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-09-03 19:19:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-03 19:19:45,402 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,403 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,403 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-09-03 19:19:45,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:19:45,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:19:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:19:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:19:45,471 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-09-03 19:19:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,533 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-03 19:19:45,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:19:45,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-03 19:19:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,534 INFO L225 Difference]: With dead ends: 24 [2019-09-03 19:19:45,535 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 19:19:45,536 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:19:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 19:19:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-09-03 19:19:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:19:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 19:19:45,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-09-03 19:19:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,542 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 19:19:45,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:19:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 19:19:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:19:45,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,543 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,543 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-09-03 19:19:45,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:45,660 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 [2019-09-03 19:19:45,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:19:45,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:19:45,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2019-09-03 19:19:45,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:19:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:19:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:19:45,744 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 19:19:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,859 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-09-03 19:19:45,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:19:45,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 19:19:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,862 INFO L225 Difference]: With dead ends: 48 [2019-09-03 19:19:45,862 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 19:19:45,864 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 19:19:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-09-03 19:19:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 19:19:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-03 19:19:45,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-09-03 19:19:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,880 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-03 19:19:45,880 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:19:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-03 19:19:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 19:19:45,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,882 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,882 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1308348629, now seen corresponding path program 1 times [2019-09-03 19:19:45,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 19:19:46,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:46,036 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:19:46,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 19:19:46,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:19:46,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-03 19:19:46,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:46,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:46,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:46,114 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-09-03 19:19:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:46,346 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2019-09-03 19:19:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:19:46,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-03 19:19:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:46,349 INFO L225 Difference]: With dead ends: 66 [2019-09-03 19:19:46,349 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 19:19:46,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:19:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 19:19:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2019-09-03 19:19:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:19:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-09-03 19:19:46,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 21 [2019-09-03 19:19:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:46,363 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-09-03 19:19:46,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-09-03 19:19:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:19:46,365 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:46,365 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:46,365 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1611011581, now seen corresponding path program 1 times [2019-09-03 19:19:46,366 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:46,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:46,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:46,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 19:19:46,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:46,538 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) [2019-09-03 19:19:46,556 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 [2019-09-03 19:19:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 19:19:46,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 19:19:46,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:46,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-03 19:19:46,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:19:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:19:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:46,646 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-09-03 19:19:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:46,732 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2019-09-03 19:19:46,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:19:46,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-09-03 19:19:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:46,736 INFO L225 Difference]: With dead ends: 73 [2019-09-03 19:19:46,737 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 19:19:46,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 19:19:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-09-03 19:19:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 19:19:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-09-03 19:19:46,758 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-09-03 19:19:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:46,758 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-09-03 19:19:46,759 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:19:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-09-03 19:19:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 19:19:46,761 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:46,762 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:46,762 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 351043197, now seen corresponding path program 2 times [2019-09-03 19:19:46,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:46,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:46,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:46,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-03 19:19:46,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:46,984 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) [2019-09-03 19:19:47,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:47,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:19:47,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:47,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 19:19:47,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:19:47,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:47,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-03 19:19:47,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:19:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:19:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:19:47,111 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-09-03 19:19:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:47,425 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2019-09-03 19:19:47,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 19:19:47,426 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2019-09-03 19:19:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:47,427 INFO L225 Difference]: With dead ends: 132 [2019-09-03 19:19:47,428 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 19:19:47,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:19:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 19:19:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2019-09-03 19:19:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-03 19:19:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-09-03 19:19:47,447 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 43 [2019-09-03 19:19:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:47,449 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-09-03 19:19:47,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:19:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-09-03 19:19:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-03 19:19:47,452 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:47,453 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:47,453 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1822793022, now seen corresponding path program 3 times [2019-09-03 19:19:47,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:47,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:47,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:47,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:47,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 136 proven. 9 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2019-09-03 19:19:47,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:47,709 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 [2019-09-03 19:19:47,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:19:48,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 19:19:48,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:48,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 19:19:48,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 143 proven. 9 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-09-03 19:19:48,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:48,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-03 19:19:48,230 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:19:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:19:48,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:48,231 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 7 states. [2019-09-03 19:19:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:48,296 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2019-09-03 19:19:48,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:19:48,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2019-09-03 19:19:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:48,298 INFO L225 Difference]: With dead ends: 149 [2019-09-03 19:19:48,298 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 19:19:48,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 19:19:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2019-09-03 19:19:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-03 19:19:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-09-03 19:19:48,311 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 72 [2019-09-03 19:19:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:48,312 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-09-03 19:19:48,312 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:19:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-09-03 19:19:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 19:19:48,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:48,313 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:48,314 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1202732862, now seen corresponding path program 4 times [2019-09-03 19:19:48,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:48,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:48,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:48,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:48,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 216 proven. 16 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-09-03 19:19:48,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:48,503 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 [2019-09-03 19:19:48,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:19:48,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:19:48,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:48,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:19:48,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 32 proven. 556 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:19:48,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:48,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-09-03 19:19:48,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:19:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:19:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:19:48,725 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 15 states. [2019-09-03 19:19:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,443 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2019-09-03 19:19:49,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 19:19:49,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2019-09-03 19:19:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,447 INFO L225 Difference]: With dead ends: 232 [2019-09-03 19:19:49,447 INFO L226 Difference]: Without dead ends: 164 [2019-09-03 19:19:49,449 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:19:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-03 19:19:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2019-09-03 19:19:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-03 19:19:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2019-09-03 19:19:49,482 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 84 [2019-09-03 19:19:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,482 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2019-09-03 19:19:49,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:19:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2019-09-03 19:19:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-03 19:19:49,484 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,485 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,485 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1637610595, now seen corresponding path program 5 times [2019-09-03 19:19:49,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2019-09-03 19:19:49,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:49,788 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 [2019-09-03 19:19:49,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:21:32,558 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 19:21:32,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:32,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 19:21:32,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 1090 proven. 25 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:21:32,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:32,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-03 19:21:32,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 19:21:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 19:21:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:21:32,726 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand 9 states. [2019-09-03 19:21:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:32,834 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2019-09-03 19:21:32,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:21:32,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-09-03 19:21:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:32,844 INFO L225 Difference]: With dead ends: 257 [2019-09-03 19:21:32,844 INFO L226 Difference]: Without dead ends: 150 [2019-09-03 19:21:32,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:21:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-03 19:21:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2019-09-03 19:21:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-03 19:21:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2019-09-03 19:21:32,859 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 125 [2019-09-03 19:21:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:32,859 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2019-09-03 19:21:32,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 19:21:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2019-09-03 19:21:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-03 19:21:32,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:32,861 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:32,862 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2071075997, now seen corresponding path program 6 times [2019-09-03 19:21:32,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:32,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:32,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 610 proven. 36 refuted. 0 times theorem prover too weak. 2132 trivial. 0 not checked. [2019-09-03 19:21:33,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:33,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:21:33,219 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:29,887 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-03 19:24:29,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:30,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:24:30,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1498 proven. 36 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2019-09-03 19:24:30,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:30,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-03 19:24:30,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:24:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:24:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:24:30,503 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 10 states. [2019-09-03 19:24:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:30,637 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2019-09-03 19:24:30,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 19:24:30,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 141 [2019-09-03 19:24:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:30,639 INFO L225 Difference]: With dead ends: 287 [2019-09-03 19:24:30,639 INFO L226 Difference]: Without dead ends: 166 [2019-09-03 19:24:30,645 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:24:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-03 19:24:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2019-09-03 19:24:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-03 19:24:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2019-09-03 19:24:30,671 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 141 [2019-09-03 19:24:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:30,672 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2019-09-03 19:24:30,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:24:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2019-09-03 19:24:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-03 19:24:30,678 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:30,678 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:30,679 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash 930508189, now seen corresponding path program 7 times [2019-09-03 19:24:30,681 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:30,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:30,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:30,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:30,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 806 proven. 49 refuted. 0 times theorem prover too weak. 2811 trivial. 0 not checked. [2019-09-03 19:24:31,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:31,089 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) [2019-09-03 19:24:31,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:31,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 19:24:31,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 1399 proven. 146 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2019-09-03 19:24:31,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:31,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-03 19:24:31,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:24:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:24:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:24:31,378 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 16 states. [2019-09-03 19:24:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:32,231 INFO L93 Difference]: Finished difference Result 473 states and 524 transitions. [2019-09-03 19:24:32,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 19:24:32,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2019-09-03 19:24:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:32,234 INFO L225 Difference]: With dead ends: 473 [2019-09-03 19:24:32,234 INFO L226 Difference]: Without dead ends: 338 [2019-09-03 19:24:32,236 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:24:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-03 19:24:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 250. [2019-09-03 19:24:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-09-03 19:24:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 266 transitions. [2019-09-03 19:24:32,252 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 266 transitions. Word has length 157 [2019-09-03 19:24:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:32,253 INFO L475 AbstractCegarLoop]: Abstraction has 250 states and 266 transitions. [2019-09-03 19:24:32,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:24:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 266 transitions. [2019-09-03 19:24:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-09-03 19:24:32,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:32,257 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 12, 12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:32,257 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:32,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1712561805, now seen corresponding path program 8 times [2019-09-03 19:24:32,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:32,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:32,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:32,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:24:32,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10540 backedges. 1614 proven. 64 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2019-09-03 19:24:32,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:32,743 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-03 19:24:32,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:24:32,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:24:32,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:32,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:24:32,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10540 backedges. 3994 proven. 488 refuted. 0 times theorem prover too weak. 6058 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:24:33,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:33,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-03 19:24:33,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:24:33,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:24:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:24:33,143 INFO L87 Difference]: Start difference. First operand 250 states and 266 transitions. Second operand 19 states. [2019-09-03 19:24:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:34,470 INFO L93 Difference]: Finished difference Result 683 states and 746 transitions. [2019-09-03 19:24:34,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-03 19:24:34,470 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 249 [2019-09-03 19:24:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:34,473 INFO L225 Difference]: With dead ends: 683 [2019-09-03 19:24:34,473 INFO L226 Difference]: Without dead ends: 458 [2019-09-03 19:24:34,476 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 19:24:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-09-03 19:24:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 358. [2019-09-03 19:24:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2019-09-03 19:24:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 378 transitions. [2019-09-03 19:24:34,496 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 378 transitions. Word has length 249 [2019-09-03 19:24:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:34,498 INFO L475 AbstractCegarLoop]: Abstraction has 358 states and 378 transitions. [2019-09-03 19:24:34,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:24:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 378 transitions. [2019-09-03 19:24:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-09-03 19:24:34,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:34,507 INFO L399 BasicCegarLoop]: trace histogram [144, 144, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:34,508 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1172817379, now seen corresponding path program 9 times [2019-09-03 19:24:34,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:34,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:34,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:34,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:34,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23342 backedges. 2738 proven. 81 refuted. 0 times theorem prover too weak. 20523 trivial. 0 not checked. [2019-09-03 19:24:35,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:35,239 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 [2019-09-03 19:24:35,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:26:57,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-03 19:26:57,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:26:57,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 19:26:57,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:26:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23342 backedges. 2756 proven. 81 refuted. 0 times theorem prover too weak. 20505 trivial. 0 not checked. [2019-09-03 19:26:57,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:26:57,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-03 19:26:57,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:26:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:26:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:26:57,326 INFO L87 Difference]: Start difference. First operand 358 states and 378 transitions. Second operand 13 states. [2019-09-03 19:26:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:26:57,580 INFO L93 Difference]: Finished difference Result 737 states and 792 transitions. [2019-09-03 19:26:57,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:26:57,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 357 [2019-09-03 19:26:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:26:57,583 INFO L225 Difference]: With dead ends: 737 [2019-09-03 19:26:57,584 INFO L226 Difference]: Without dead ends: 406 [2019-09-03 19:26:57,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:26:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-09-03 19:26:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 390. [2019-09-03 19:26:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2019-09-03 19:26:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 410 transitions. [2019-09-03 19:26:57,606 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 410 transitions. Word has length 357 [2019-09-03 19:26:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:26:57,607 INFO L475 AbstractCegarLoop]: Abstraction has 390 states and 410 transitions. [2019-09-03 19:26:57,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:26:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 410 transitions. [2019-09-03 19:26:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-09-03 19:26:57,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:26:57,613 INFO L399 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:26:57,613 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:26:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:26:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -959439843, now seen corresponding path program 10 times [2019-09-03 19:26:57,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:26:57,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:26:57,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:57,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:26:57,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:26:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 28446 backedges. 3338 proven. 100 refuted. 0 times theorem prover too weak. 25008 trivial. 0 not checked. [2019-09-03 19:26:58,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:26:58,449 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:26:58,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:26:58,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:26:58,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:26:58,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 19:26:58,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:26:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28446 backedges. 0 proven. 21833 refuted. 0 times theorem prover too weak. 6613 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:26:59,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:26:59,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-03 19:26:59,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:26:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:26:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:26:59,022 INFO L87 Difference]: Start difference. First operand 390 states and 410 transitions. Second operand 23 states. [2019-09-03 19:27:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:27:02,038 INFO L93 Difference]: Finished difference Result 1012 states and 1086 transitions. [2019-09-03 19:27:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-03 19:27:02,039 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 389 [2019-09-03 19:27:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:27:02,042 INFO L225 Difference]: With dead ends: 1012 [2019-09-03 19:27:02,042 INFO L226 Difference]: Without dead ends: 651 [2019-09-03 19:27:02,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=4893, Unknown=0, NotChecked=0, Total=5256 [2019-09-03 19:27:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-09-03 19:27:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 525. [2019-09-03 19:27:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-09-03 19:27:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 550 transitions. [2019-09-03 19:27:02,070 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 550 transitions. Word has length 389 [2019-09-03 19:27:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:27:02,070 INFO L475 AbstractCegarLoop]: Abstraction has 525 states and 550 transitions. [2019-09-03 19:27:02,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:27:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 550 transitions. [2019-09-03 19:27:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-09-03 19:27:02,081 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:27:02,082 INFO L399 BasicCegarLoop]: trace histogram [220, 220, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:27:02,082 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:27:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:27:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -63134274, now seen corresponding path program 11 times [2019-09-03 19:27:02,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:27:02,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:27:02,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:02,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:27:02,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 53285 backedges. 5064 proven. 121 refuted. 0 times theorem prover too weak. 48100 trivial. 0 not checked. [2019-09-03 19:27:03,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:03,652 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 [2019-09-03 19:27:03,668 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:28:42,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 19:28:42,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:28:42,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 19:28:42,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:28:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53285 backedges. 23798 proven. 121 refuted. 0 times theorem prover too weak. 29366 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:28:43,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:28:43,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-03 19:28:43,290 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:28:43,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:28:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:28:43,292 INFO L87 Difference]: Start difference. First operand 525 states and 550 transitions. Second operand 15 states. [2019-09-03 19:28:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:28:43,682 INFO L93 Difference]: Finished difference Result 1079 states and 1148 transitions. [2019-09-03 19:28:43,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:28:43,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 524 [2019-09-03 19:28:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:28:43,689 INFO L225 Difference]: With dead ends: 1079 [2019-09-03 19:28:43,689 INFO L226 Difference]: Without dead ends: 585 [2019-09-03 19:28:43,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:28:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-09-03 19:28:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 565. [2019-09-03 19:28:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2019-09-03 19:28:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 590 transitions. [2019-09-03 19:28:43,736 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 590 transitions. Word has length 524 [2019-09-03 19:28:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:28:43,736 INFO L475 AbstractCegarLoop]: Abstraction has 565 states and 590 transitions. [2019-09-03 19:28:43,736 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:28:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 590 transitions. [2019-09-03 19:28:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2019-09-03 19:28:43,744 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:28:43,744 INFO L399 BasicCegarLoop]: trace histogram [240, 240, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:28:43,745 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:28:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:28:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash 378755262, now seen corresponding path program 12 times [2019-09-03 19:28:43,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:28:43,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:28:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:28:43,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:28:43,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:28:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:28:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 62865 backedges. 5976 proven. 144 refuted. 0 times theorem prover too weak. 56745 trivial. 0 not checked. [2019-09-03 19:28:45,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:28:45,637 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 [2019-09-03 19:28:45,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:32:10,630 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-03 19:32:10,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:32:12,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:32:12,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:32:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 62865 backedges. 28070 proven. 144 refuted. 0 times theorem prover too weak. 34651 trivial. 0 not checked. [2019-09-03 19:32:12,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:32:12,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-03 19:32:12,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:32:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:32:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:32:12,874 INFO L87 Difference]: Start difference. First operand 565 states and 590 transitions. Second operand 16 states. [2019-09-03 19:32:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:13,258 INFO L93 Difference]: Finished difference Result 1157 states and 1226 transitions. [2019-09-03 19:32:13,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 19:32:13,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 564 [2019-09-03 19:32:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:13,262 INFO L225 Difference]: With dead ends: 1157 [2019-09-03 19:32:13,262 INFO L226 Difference]: Without dead ends: 625 [2019-09-03 19:32:13,264 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 563 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:32:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2019-09-03 19:32:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 605. [2019-09-03 19:32:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-09-03 19:32:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 630 transitions. [2019-09-03 19:32:13,291 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 630 transitions. Word has length 564 [2019-09-03 19:32:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:13,291 INFO L475 AbstractCegarLoop]: Abstraction has 605 states and 630 transitions. [2019-09-03 19:32:13,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:32:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 630 transitions. [2019-09-03 19:32:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2019-09-03 19:32:13,296 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:13,297 INFO L399 BasicCegarLoop]: trace histogram [260, 260, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:13,297 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash -675411522, now seen corresponding path program 13 times [2019-09-03 19:32:13,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:13,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:13,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:13,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:32:13,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 73245 backedges. 6964 proven. 169 refuted. 0 times theorem prover too weak. 66112 trivial. 0 not checked. [2019-09-03 19:32:14,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:14,954 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 [2019-09-03 19:32:14,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:32:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:15,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 19:32:15,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:32:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 73245 backedges. 23529 proven. 2303 refuted. 0 times theorem prover too weak. 47413 trivial. 0 not checked. [2019-09-03 19:32:15,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:32:15,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-09-03 19:32:15,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 19:32:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 19:32:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:32:15,997 INFO L87 Difference]: Start difference. First operand 605 states and 630 transitions. Second operand 26 states. [2019-09-03 19:32:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:19,841 INFO L93 Difference]: Finished difference Result 1550 states and 1644 transitions. [2019-09-03 19:32:19,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-03 19:32:19,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 604 [2019-09-03 19:32:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:19,846 INFO L225 Difference]: With dead ends: 1550 [2019-09-03 19:32:19,846 INFO L226 Difference]: Without dead ends: 980 [2019-09-03 19:32:19,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=7728, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 19:32:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2019-09-03 19:32:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 800. [2019-09-03 19:32:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2019-09-03 19:32:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 830 transitions. [2019-09-03 19:32:19,890 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 830 transitions. Word has length 604 [2019-09-03 19:32:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:19,891 INFO L475 AbstractCegarLoop]: Abstraction has 800 states and 830 transitions. [2019-09-03 19:32:19,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 19:32:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 830 transitions. [2019-09-03 19:32:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2019-09-03 19:32:19,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:19,903 INFO L399 BasicCegarLoop]: trace histogram [350, 350, 25, 25, 25, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:19,903 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1613923331, now seen corresponding path program 14 times [2019-09-03 19:32:19,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:19,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:19,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:19,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:32:19,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:21,905 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2019-09-03 19:32:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 131960 backedges. 10138 proven. 196 refuted. 0 times theorem prover too weak. 121626 trivial. 0 not checked. [2019-09-03 19:32:22,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:22,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:32:22,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:32:23,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:32:23,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:32:23,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 19:32:23,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:32:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 131960 backedges. 42349 proven. 4359 refuted. 0 times theorem prover too weak. 85252 trivial. 0 not checked. [2019-09-03 19:32:23,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:32:23,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-09-03 19:32:23,651 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 19:32:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 19:32:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:32:23,651 INFO L87 Difference]: Start difference. First operand 800 states and 830 transitions. Second operand 29 states. [2019-09-03 19:32:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:28,715 INFO L93 Difference]: Finished difference Result 1973 states and 2082 transitions. [2019-09-03 19:32:28,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-09-03 19:32:28,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 799 [2019-09-03 19:32:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:28,723 INFO L225 Difference]: With dead ends: 1973 [2019-09-03 19:32:28,723 INFO L226 Difference]: Without dead ends: 1210 [2019-09-03 19:32:28,729 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=585, Invalid=12071, Unknown=0, NotChecked=0, Total=12656 [2019-09-03 19:32:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2019-09-03 19:32:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1015. [2019-09-03 19:32:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-09-03 19:32:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1050 transitions. [2019-09-03 19:32:28,779 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1050 transitions. Word has length 799 [2019-09-03 19:32:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:28,779 INFO L475 AbstractCegarLoop]: Abstraction has 1015 states and 1050 transitions. [2019-09-03 19:32:28,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 19:32:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1050 transitions. [2019-09-03 19:32:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2019-09-03 19:32:28,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:28,791 INFO L399 BasicCegarLoop]: trace histogram [450, 450, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:28,792 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1388522274, now seen corresponding path program 15 times [2019-09-03 19:32:28,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:28,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:28,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:32:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 217040 backedges. 13988 proven. 225 refuted. 0 times theorem prover too weak. 202827 trivial. 0 not checked. [2019-09-03 19:32:32,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:32,842 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 [2019-09-03 19:32:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2