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/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:37:11,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:37:11,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:37:11,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:37:11,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:37:11,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:37:11,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:37:11,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:37:11,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:37:11,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:37:11,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:37:11,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:37:11,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:37:11,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:37:11,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:37:11,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:37:11,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:37:11,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:37:11,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:37:11,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:37:11,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:37:11,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:37:11,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:37:11,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:37:11,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-07 09:37:11,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-07 09:37:11,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-07 09:37:11,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-07 09:37:11,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-07 09:37:11,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-07 09:37:11,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:37:11,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:37:11,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:37:11,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:37:11,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:37:11,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:37:11,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:37:11,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:37:11,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:37:11,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:37:11,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:37:11,307 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 [2019-09-07 09:37:11,323 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:37:11,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:37:11,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:37:11,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:37:11,326 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:37:11,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:37:11,327 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:37:11,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:37:11,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:37:11,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:37:11,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:37:11,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:37:11,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:37:11,328 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:37:11,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:37:11,328 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:37:11,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:37:11,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:37:11,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:37:11,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:37:11,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:37:11,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:37:11,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:37:11,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:37:11,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:37:11,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:37:11,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:37:11,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:37:11,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:37:11,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:37:11,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:37:11,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:37:11,384 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:37:11,384 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:37:11,385 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-09-07 09:37:11,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6782f9d1/e10ce35887b346bdb90f2ae252a6bf79/FLAG3ff5d2cb5 [2019-09-07 09:37:11,840 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:37:11,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-09-07 09:37:11,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6782f9d1/e10ce35887b346bdb90f2ae252a6bf79/FLAG3ff5d2cb5 [2019-09-07 09:37:12,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6782f9d1/e10ce35887b346bdb90f2ae252a6bf79 [2019-09-07 09:37:12,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:37:12,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:37:12,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:37:12,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:37:12,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:37:12,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af94a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12, skipping insertion in model container [2019-09-07 09:37:12,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,279 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:37:12,301 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:37:12,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:37:12,506 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:37:12,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:37:12,549 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:37:12,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12 WrapperNode [2019-09-07 09:37:12,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:37:12,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:37:12,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:37:12,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:37:12,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (1/1) ... [2019-09-07 09:37:12,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:37:12,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:37:12,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:37:12,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:37:12,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (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 [2019-09-07 09:37:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:37:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:37:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:37:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:37:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:37:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:37:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:37:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:37:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:37:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:37:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:37:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:37:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:37:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:37:13,083 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:37:13,083 INFO L283 CfgBuilder]: Removed 7 assume(true) statements. [2019-09-07 09:37:13,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:37:13 BoogieIcfgContainer [2019-09-07 09:37:13,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:37:13,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:37:13,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:37:13,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:37:13,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:37:12" (1/3) ... [2019-09-07 09:37:13,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0c5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:37:13, skipping insertion in model container [2019-09-07 09:37:13,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:37:12" (2/3) ... [2019-09-07 09:37:13,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0c5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:37:13, skipping insertion in model container [2019-09-07 09:37:13,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:37:13" (3/3) ... [2019-09-07 09:37:13,101 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2019-09-07 09:37:13,110 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:37:13,118 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:37:13,140 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:37:13,173 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:37:13,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:37:13,174 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:37:13,174 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:37:13,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:37:13,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:37:13,175 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:37:13,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:37:13,175 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:37:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-09-07 09:37:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:37:13,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:13,197 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:13,199 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-09-07 09:37:13,207 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:13,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:13,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:13,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:37:13,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:37:13,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:37:13,381 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:37:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:37:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:37:13,398 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2019-09-07 09:37:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:13,423 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-07 09:37:13,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:37:13,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-09-07 09:37:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:13,431 INFO L225 Difference]: With dead ends: 70 [2019-09-07 09:37:13,432 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 09:37:13,435 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 [2019-09-07 09:37:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 09:37:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-07 09:37:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 09:37:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-09-07 09:37:13,473 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-09-07 09:37:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:13,474 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-09-07 09:37:13,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:37:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-09-07 09:37:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:37:13,475 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:13,475 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:13,476 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-09-07 09:37:13,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:13,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:13,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:37:13,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:37:13,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:37:13,571 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:37:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:37:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:37:13,572 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2019-09-07 09:37:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:13,608 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-09-07 09:37:13,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:37:13,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-09-07 09:37:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:13,610 INFO L225 Difference]: With dead ends: 62 [2019-09-07 09:37:13,610 INFO L226 Difference]: Without dead ends: 36 [2019-09-07 09:37:13,612 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 [2019-09-07 09:37:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-07 09:37:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-09-07 09:37:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-07 09:37:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-09-07 09:37:13,619 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-09-07 09:37:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:13,620 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-09-07 09:37:13,620 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:37:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-09-07 09:37:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 09:37:13,621 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:13,621 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:13,622 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-09-07 09:37:13,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:13,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:13,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:13,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:37:13,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:37:13,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:37:13,684 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:37:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:37:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:37:13,685 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2019-09-07 09:37:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:13,776 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-09-07 09:37:13,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:37:13,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-09-07 09:37:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:13,778 INFO L225 Difference]: With dead ends: 68 [2019-09-07 09:37:13,778 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 09:37:13,779 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 [2019-09-07 09:37:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 09:37:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-09-07 09:37:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:37:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-09-07 09:37:13,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-09-07 09:37:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:13,787 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-09-07 09:37:13,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:37:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-09-07 09:37:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:37:13,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:13,789 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:13,789 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-09-07 09:37:13,790 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:13,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:13,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:13,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 09:37:13,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:13,929 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 [2019-09-07 09:37:13,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:14,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:37:14,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 09:37:14,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:14,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:37:14,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:37:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:37:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:37:14,089 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-09-07 09:37:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:14,132 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-09-07 09:37:14,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:37:14,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-09-07 09:37:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:14,134 INFO L225 Difference]: With dead ends: 74 [2019-09-07 09:37:14,134 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:37:14,135 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:37:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:37:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-07 09:37:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:37:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-09-07 09:37:14,142 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-09-07 09:37:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:14,143 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-09-07 09:37:14,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:37:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-09-07 09:37:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:37:14,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:14,145 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:14,145 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-09-07 09:37:14,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:14,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:37:14,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:14,226 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 [2019-09-07 09:37:14,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:37:14,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:37:14,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:14,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:37:14,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:37:14,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:14,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 09:37:14,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:37:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:37:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:14,335 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-09-07 09:37:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:14,449 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2019-09-07 09:37:14,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:37:14,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-09-07 09:37:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:14,451 INFO L225 Difference]: With dead ends: 91 [2019-09-07 09:37:14,451 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:37:14,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:37:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-09-07 09:37:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 09:37:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-09-07 09:37:14,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 37 [2019-09-07 09:37:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:14,460 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-09-07 09:37:14,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:37:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-09-07 09:37:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 09:37:14,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:14,462 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:14,462 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1340334980, now seen corresponding path program 3 times [2019-09-07 09:37:14,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:14,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:14,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:14,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:37:14,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:14,547 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) [2019-09-07 09:37:14,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:14,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:37:14,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:14,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:37:14,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:37:14,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:14,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:37:14,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:37:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:37:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:37:14,639 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2019-09-07 09:37:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:14,753 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2019-09-07 09:37:14,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:37:14,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-09-07 09:37:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:14,755 INFO L225 Difference]: With dead ends: 104 [2019-09-07 09:37:14,755 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 09:37:14,756 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:37:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 09:37:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-09-07 09:37:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 09:37:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-09-07 09:37:14,765 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2019-09-07 09:37:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:14,765 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-09-07 09:37:14,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:37:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-09-07 09:37:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 09:37:14,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:14,774 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:14,774 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -493166382, now seen corresponding path program 4 times [2019-09-07 09:37:14,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:14,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:14,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:14,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 09:37:14,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:14,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:37:14,930 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:14,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:37:14,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:14,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:37:14,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 09:37:14,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:14,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:37:14,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:37:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:37:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:14,993 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2019-09-07 09:37:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:15,020 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2019-09-07 09:37:15,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:37:15,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-09-07 09:37:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:15,022 INFO L225 Difference]: With dead ends: 118 [2019-09-07 09:37:15,022 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 09:37:15,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 09:37:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-09-07 09:37:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:37:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2019-09-07 09:37:15,030 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 59 [2019-09-07 09:37:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:15,030 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2019-09-07 09:37:15,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:37:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2019-09-07 09:37:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:37:15,031 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:15,031 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:15,032 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash -291552272, now seen corresponding path program 5 times [2019-09-07 09:37:15,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:15,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:15,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:15,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:15,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-07 09:37:15,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:15,139 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) [2019-09-07 09:37:15,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:16,555 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:37:16,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:16,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:37:16,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-07 09:37:16,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:16,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:37:16,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:37:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:37:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:16,599 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 7 states. [2019-09-07 09:37:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:16,731 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2019-09-07 09:37:16,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:37:16,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2019-09-07 09:37:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:16,733 INFO L225 Difference]: With dead ends: 124 [2019-09-07 09:37:16,733 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 09:37:16,734 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:37:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 09:37:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2019-09-07 09:37:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 09:37:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-09-07 09:37:16,742 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 61 [2019-09-07 09:37:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:16,742 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-09-07 09:37:16,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:37:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-09-07 09:37:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 09:37:16,743 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:16,744 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:16,744 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1226504378, now seen corresponding path program 6 times [2019-09-07 09:37:16,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:16,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:16,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:16,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:16,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-07 09:37:16,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:16,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:37:16,845 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:17,106 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:37:17,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:17,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:37:17,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-07 09:37:17,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:17,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:37:17,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:37:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:37:17,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:37:17,177 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2019-09-07 09:37:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:17,364 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2019-09-07 09:37:17,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:37:17,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2019-09-07 09:37:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:17,366 INFO L225 Difference]: With dead ends: 155 [2019-09-07 09:37:17,366 INFO L226 Difference]: Without dead ends: 94 [2019-09-07 09:37:17,367 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:37:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-07 09:37:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2019-09-07 09:37:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 09:37:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-09-07 09:37:17,385 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 71 [2019-09-07 09:37:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:17,386 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-09-07 09:37:17,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:37:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-09-07 09:37:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:37:17,387 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:17,390 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:17,390 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1032720454, now seen corresponding path program 7 times [2019-09-07 09:37:17,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:17,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:17,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:17,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:17,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-09-07 09:37:17,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:17,505 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 [2019-09-07 09:37:17,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:17,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:37:17,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-09-07 09:37:17,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:17,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:37:17,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:37:17,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:37:17,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:37:17,613 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 9 states. [2019-09-07 09:37:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:17,655 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2019-09-07 09:37:17,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:37:17,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2019-09-07 09:37:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:17,659 INFO L225 Difference]: With dead ends: 162 [2019-09-07 09:37:17,659 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 09:37:17,660 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:37:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 09:37:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-09-07 09:37:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-07 09:37:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2019-09-07 09:37:17,682 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 83 [2019-09-07 09:37:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:17,683 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2019-09-07 09:37:17,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:37:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2019-09-07 09:37:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-07 09:37:17,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:17,688 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:17,688 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 770070744, now seen corresponding path program 8 times [2019-09-07 09:37:17,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:17,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:17,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:17,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:17,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-09-07 09:37:17,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:17,852 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) [2019-09-07 09:37:17,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:17,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:37:17,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:17,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:37:17,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-09-07 09:37:18,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:18,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:37:18,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:37:18,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:37:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:37:18,018 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 15 states. [2019-09-07 09:37:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:18,230 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2019-09-07 09:37:18,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:37:18,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2019-09-07 09:37:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:18,232 INFO L225 Difference]: With dead ends: 179 [2019-09-07 09:37:18,232 INFO L226 Difference]: Without dead ends: 108 [2019-09-07 09:37:18,233 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:37:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-07 09:37:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2019-09-07 09:37:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-07 09:37:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2019-09-07 09:37:18,250 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 85 [2019-09-07 09:37:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:18,251 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2019-09-07 09:37:18,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:37:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2019-09-07 09:37:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:37:18,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:18,254 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:18,254 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 114050636, now seen corresponding path program 9 times [2019-09-07 09:37:18,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:18,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:18,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:18,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:18,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2019-09-07 09:37:18,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:18,352 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) [2019-09-07 09:37:18,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:20,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:37:20,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:20,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:37:20,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-09-07 09:37:20,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:20,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-09-07 09:37:20,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:37:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:37:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:37:20,428 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 12 states. [2019-09-07 09:37:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:20,629 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2019-09-07 09:37:20,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:37:20,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2019-09-07 09:37:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:20,630 INFO L225 Difference]: With dead ends: 189 [2019-09-07 09:37:20,631 INFO L226 Difference]: Without dead ends: 122 [2019-09-07 09:37:20,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:37:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-07 09:37:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-09-07 09:37:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:37:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2019-09-07 09:37:20,639 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 97 [2019-09-07 09:37:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:20,639 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2019-09-07 09:37:20,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:37:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2019-09-07 09:37:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 09:37:20,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:20,641 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:20,641 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1504537736, now seen corresponding path program 10 times [2019-09-07 09:37:20,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:20,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:20,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-09-07 09:37:20,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:20,743 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 [2019-09-07 09:37:20,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:37:20,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:37:20,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:20,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:37:20,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-09-07 09:37:20,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:20,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:37:20,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:37:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:37:20,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:37:20,859 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand 11 states. [2019-09-07 09:37:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:20,895 INFO L93 Difference]: Finished difference Result 226 states and 238 transitions. [2019-09-07 09:37:20,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:37:20,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2019-09-07 09:37:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:20,896 INFO L225 Difference]: With dead ends: 226 [2019-09-07 09:37:20,897 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 09:37:20,897 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:37:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 09:37:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-09-07 09:37:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 09:37:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2019-09-07 09:37:20,904 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 117 [2019-09-07 09:37:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:20,904 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2019-09-07 09:37:20,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:37:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2019-09-07 09:37:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 09:37:20,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:20,906 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:20,906 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash 684930326, now seen corresponding path program 11 times [2019-09-07 09:37:20,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:20,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:20,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:20,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:20,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-09-07 09:37:21,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:21,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:37:21,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:38:12,117 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:38:12,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:12,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:38:12,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-09-07 09:38:12,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:12,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:38:12,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:38:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:38:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:38:12,228 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 12 states. [2019-09-07 09:38:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:12,266 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2019-09-07 09:38:12,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:38:12,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2019-09-07 09:38:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:12,269 INFO L225 Difference]: With dead ends: 228 [2019-09-07 09:38:12,269 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 09:38:12,270 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:38:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 09:38:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-09-07 09:38:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 09:38:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2019-09-07 09:38:12,276 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 119 [2019-09-07 09:38:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:12,276 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2019-09-07 09:38:12,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:38:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2019-09-07 09:38:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 09:38:12,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:12,278 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:12,278 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 229762868, now seen corresponding path program 12 times [2019-09-07 09:38:12,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:12,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:12,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:12,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:12,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-09-07 09:38:12,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:12,435 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 [2019-09-07 09:38:12,458 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:38:24,570 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:38:24,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:24,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:38:24,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:38:24,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:24,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:38:24,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:38:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:38:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:38:24,719 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 21 states. [2019-09-07 09:38:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:24,947 INFO L93 Difference]: Finished difference Result 245 states and 262 transitions. [2019-09-07 09:38:24,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:38:24,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2019-09-07 09:38:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:24,949 INFO L225 Difference]: With dead ends: 245 [2019-09-07 09:38:24,949 INFO L226 Difference]: Without dead ends: 144 [2019-09-07 09:38:24,950 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:38:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-07 09:38:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2019-09-07 09:38:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-07 09:38:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2019-09-07 09:38:24,957 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 121 [2019-09-07 09:38:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:24,957 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2019-09-07 09:38:24,957 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:38:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2019-09-07 09:38:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-07 09:38:24,959 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:24,959 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:24,960 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash 416520872, now seen corresponding path program 13 times [2019-09-07 09:38:24,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:24,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:24,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-09-07 09:38:25,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:25,112 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 [2019-09-07 09:38:25,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:38:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:25,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:38:25,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2019-09-07 09:38:25,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:25,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:38:25,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:38:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:38:25,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:38:25,371 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand 23 states. [2019-09-07 09:38:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:25,643 INFO L93 Difference]: Finished difference Result 267 states and 284 transitions. [2019-09-07 09:38:25,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:38:25,644 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 133 [2019-09-07 09:38:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:25,645 INFO L225 Difference]: With dead ends: 267 [2019-09-07 09:38:25,645 INFO L226 Difference]: Without dead ends: 156 [2019-09-07 09:38:25,647 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:38:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-07 09:38:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2019-09-07 09:38:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-07 09:38:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2019-09-07 09:38:25,654 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 133 [2019-09-07 09:38:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:25,655 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2019-09-07 09:38:25,655 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:38:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2019-09-07 09:38:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-07 09:38:25,656 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:25,657 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:25,657 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 83922972, now seen corresponding path program 14 times [2019-09-07 09:38:25,657 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:25,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:25,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:25,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:38:25,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2019-09-07 09:38:25,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:25,821 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 [2019-09-07 09:38:25,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:38:25,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:38:25,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:25,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:38:25,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-09-07 09:38:26,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:26,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:38:26,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:38:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:38:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:38:26,129 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand 25 states. [2019-09-07 09:38:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:26,431 INFO L93 Difference]: Finished difference Result 289 states and 306 transitions. [2019-09-07 09:38:26,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:38:26,433 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2019-09-07 09:38:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:26,434 INFO L225 Difference]: With dead ends: 289 [2019-09-07 09:38:26,434 INFO L226 Difference]: Without dead ends: 168 [2019-09-07 09:38:26,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:38:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-09-07 09:38:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2019-09-07 09:38:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-07 09:38:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2019-09-07 09:38:26,441 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 145 [2019-09-07 09:38:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:26,443 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2019-09-07 09:38:26,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:38:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2019-09-07 09:38:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-07 09:38:26,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:26,445 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:26,445 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1383479408, now seen corresponding path program 15 times [2019-09-07 09:38:26,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:26,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:26,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:26,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:26,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-09-07 09:38:26,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:26,708 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 [2019-09-07 09:38:26,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:39:10,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:39:10,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:10,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-07 09:39:10,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 44 proven. 121 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2019-09-07 09:39:10,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:10,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 19 [2019-09-07 09:39:10,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:39:10,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:39:10,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:39:10,439 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 19 states. [2019-09-07 09:39:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:10,966 INFO L93 Difference]: Finished difference Result 289 states and 309 transitions. [2019-09-07 09:39:10,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:39:10,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 157 [2019-09-07 09:39:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:10,968 INFO L225 Difference]: With dead ends: 289 [2019-09-07 09:39:10,968 INFO L226 Difference]: Without dead ends: 182 [2019-09-07 09:39:10,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:39:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-09-07 09:39:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2019-09-07 09:39:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-09-07 09:39:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2019-09-07 09:39:10,977 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 157 [2019-09-07 09:39:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:10,977 INFO L475 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2019-09-07 09:39:10,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:39:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2019-09-07 09:39:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-07 09:39:10,979 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:10,979 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:10,980 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -232109380, now seen corresponding path program 16 times [2019-09-07 09:39:10,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:10,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:10,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2019-09-07 09:39:11,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:11,134 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:39:11,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:39:11,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:39:11,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:11,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:39:11,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2019-09-07 09:39:11,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:11,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2019-09-07 09:39:11,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:39:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:39:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:39:11,490 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand 29 states. [2019-09-07 09:39:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:11,887 INFO L93 Difference]: Finished difference Result 351 states and 368 transitions. [2019-09-07 09:39:11,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:39:11,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 177 [2019-09-07 09:39:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:11,891 INFO L225 Difference]: With dead ends: 351 [2019-09-07 09:39:11,891 INFO L226 Difference]: Without dead ends: 200 [2019-09-07 09:39:11,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:39:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-09-07 09:39:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2019-09-07 09:39:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:39:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 200 transitions. [2019-09-07 09:39:11,899 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 200 transitions. Word has length 177 [2019-09-07 09:39:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:11,900 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 200 transitions. [2019-09-07 09:39:11,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:39:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 200 transitions. [2019-09-07 09:39:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-07 09:39:11,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:11,902 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:11,902 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash 100074032, now seen corresponding path program 17 times [2019-09-07 09:39:11,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:11,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:11,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:11,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:11,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2019-09-07 09:39:12,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:12,121 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 [2019-09-07 09:39:12,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:41:16,211 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 09:41:16,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:16,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:41:16,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-09-07 09:41:16,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:16,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:41:16,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:41:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:41:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:41:16,582 INFO L87 Difference]: Start difference. First operand 194 states and 200 transitions. Second operand 31 states. [2019-09-07 09:41:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:17,003 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2019-09-07 09:41:17,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:41:17,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 189 [2019-09-07 09:41:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:17,006 INFO L225 Difference]: With dead ends: 373 [2019-09-07 09:41:17,006 INFO L226 Difference]: Without dead ends: 212 [2019-09-07 09:41:17,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:41:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-07 09:41:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2019-09-07 09:41:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-09-07 09:41:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 212 transitions. [2019-09-07 09:41:17,017 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 212 transitions. Word has length 189 [2019-09-07 09:41:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:17,017 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 212 transitions. [2019-09-07 09:41:17,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:41:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 212 transitions. [2019-09-07 09:41:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-07 09:41:17,020 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:17,020 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:17,020 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2099051428, now seen corresponding path program 18 times [2019-09-07 09:41:17,021 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:17,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:17,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:17,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:17,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2019-09-07 09:41:17,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:17,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:41:17,334 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:07,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 09:43:07,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:07,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-07 09:43:07,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2019-09-07 09:43:07,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:07,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2019-09-07 09:43:07,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 09:43:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 09:43:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:43:07,647 INFO L87 Difference]: Start difference. First operand 206 states and 212 transitions. Second operand 35 states. [2019-09-07 09:43:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:08,536 INFO L93 Difference]: Finished difference Result 396 states and 414 transitions. [2019-09-07 09:43:08,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 09:43:08,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 201 [2019-09-07 09:43:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:08,537 INFO L225 Difference]: With dead ends: 396 [2019-09-07 09:43:08,538 INFO L226 Difference]: Without dead ends: 225 [2019-09-07 09:43:08,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1923, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:43:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-09-07 09:43:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2019-09-07 09:43:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-07 09:43:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2019-09-07 09:43:08,556 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 201 [2019-09-07 09:43:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:08,557 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2019-09-07 09:43:08,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 09:43:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2019-09-07 09:43:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-09-07 09:43:08,558 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:08,558 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:08,558 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -332140362, now seen corresponding path program 19 times [2019-09-07 09:43:08,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:08,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:08,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:08,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:08,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2019-09-07 09:43:08,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:08,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:43:08,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:08,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:43:08,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2019-09-07 09:43:09,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:09,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:43:09,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:43:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:43:09,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:43:09,075 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 20 states. [2019-09-07 09:43:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:09,146 INFO L93 Difference]: Finished difference Result 404 states and 416 transitions. [2019-09-07 09:43:09,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:43:09,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 215 [2019-09-07 09:43:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:09,148 INFO L225 Difference]: With dead ends: 404 [2019-09-07 09:43:09,148 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 09:43:09,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:43:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 09:43:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2019-09-07 09:43:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-09-07 09:43:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2019-09-07 09:43:09,158 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 215 [2019-09-07 09:43:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:09,158 INFO L475 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2019-09-07 09:43:09,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:43:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2019-09-07 09:43:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-07 09:43:09,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:09,160 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:09,160 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -491603244, now seen corresponding path program 20 times [2019-09-07 09:43:09,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:09,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:09,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:09,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:09,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1313 trivial. 0 not checked. [2019-09-07 09:43:09,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:09,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:09,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:43:09,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:43:09,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:09,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:43:09,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2019-09-07 09:43:09,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:09,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:43:09,841 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:43:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:43:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:43:09,842 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 37 states. [2019-09-07 09:43:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:10,288 INFO L93 Difference]: Finished difference Result 421 states and 438 transitions. [2019-09-07 09:43:10,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:43:10,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 217 [2019-09-07 09:43:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:10,291 INFO L225 Difference]: With dead ends: 421 [2019-09-07 09:43:10,291 INFO L226 Difference]: Without dead ends: 240 [2019-09-07 09:43:10,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:43:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-09-07 09:43:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2019-09-07 09:43:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-07 09:43:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2019-09-07 09:43:10,303 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 217 [2019-09-07 09:43:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:10,303 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2019-09-07 09:43:10,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:43:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2019-09-07 09:43:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-07 09:43:10,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:10,305 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:10,305 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1997176392, now seen corresponding path program 21 times [2019-09-07 09:43:10,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:10,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:10,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:10,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:10,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2019-09-07 09:43:10,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:10,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:10,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:45:06,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 09:45:06,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:06,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:45:06,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2019-09-07 09:45:06,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:06,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 23 [2019-09-07 09:45:06,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:45:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:45:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:45:06,669 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand 23 states. [2019-09-07 09:45:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:07,342 INFO L93 Difference]: Finished difference Result 404 states and 419 transitions. [2019-09-07 09:45:07,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:45:07,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 229 [2019-09-07 09:45:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:07,344 INFO L225 Difference]: With dead ends: 404 [2019-09-07 09:45:07,344 INFO L226 Difference]: Without dead ends: 249 [2019-09-07 09:45:07,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:45:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-09-07 09:45:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2019-09-07 09:45:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-09-07 09:45:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2019-09-07 09:45:07,354 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 229 [2019-09-07 09:45:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:07,354 INFO L475 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2019-09-07 09:45:07,354 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:45:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2019-09-07 09:45:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-09-07 09:45:07,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:07,356 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:07,356 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 302756766, now seen corresponding path program 22 times [2019-09-07 09:45:07,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:07,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:07,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1944 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2019-09-07 09:45:07,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:07,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:07,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:45:07,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:07,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:07,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:45:07,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1944 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Stream Closed [2019-09-07 09:45:07,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:07,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:45:07,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:45:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:45:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:45:07,877 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 22 states. [2019-09-07 09:45:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:07,952 INFO L93 Difference]: Finished difference Result 448 states and 460 transitions. [2019-09-07 09:45:07,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:45:07,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 239 [2019-09-07 09:45:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:07,956 INFO L225 Difference]: With dead ends: 448 [2019-09-07 09:45:07,956 INFO L226 Difference]: Without dead ends: 247 [2019-09-07 09:45:07,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:45:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-09-07 09:45:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2019-09-07 09:45:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2019-09-07 09:45:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 252 transitions. [2019-09-07 09:45:07,966 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 252 transitions. Word has length 239 [2019-09-07 09:45:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:07,966 INFO L475 AbstractCegarLoop]: Abstraction has 246 states and 252 transitions. [2019-09-07 09:45:07,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:45:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 252 transitions. [2019-09-07 09:45:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-09-07 09:45:07,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:07,968 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:07,968 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1997175876, now seen corresponding path program 23 times [2019-09-07 09:45:07,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:07,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:07,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:07,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:07,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2019-09-07 09:45:08,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:08,263 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:45:08,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:02,002 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 09:48:02,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:02,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:48:02,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2019-09-07 09:48:02,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:02,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:48:02,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:48:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:48:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:48:02,150 INFO L87 Difference]: Start difference. First operand 246 states and 252 transitions. Second operand 22 states. [2019-09-07 09:48:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:02,505 INFO L93 Difference]: Finished difference Result 424 states and 439 transitions. [2019-09-07 09:48:02,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:48:02,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 241 [2019-09-07 09:48:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:02,508 INFO L225 Difference]: With dead ends: 424 [2019-09-07 09:48:02,508 INFO L226 Difference]: Without dead ends: 261 [2019-09-07 09:48:02,509 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:48:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-09-07 09:48:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2019-09-07 09:48:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-09-07 09:48:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2019-09-07 09:48:02,518 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 241 [2019-09-07 09:48:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:02,518 INFO L475 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2019-09-07 09:48:02,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:48:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2019-09-07 09:48:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-07 09:48:02,520 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:02,520 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:02,520 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2051524590, now seen corresponding path program 24 times [2019-09-07 09:48:02,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:02,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:02,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:02,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:02,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2019-09-07 09:48:02,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:02,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:02,936 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:50:30,950 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-07 09:50:30,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:31,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:50:31,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2019-09-07 09:50:31,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:31,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2019-09-07 09:50:31,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 09:50:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 09:50:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:50:31,473 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 42 states. [2019-09-07 09:50:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:32,071 INFO L93 Difference]: Finished difference Result 485 states and 502 transitions. [2019-09-07 09:50:32,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-07 09:50:32,072 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 251 [2019-09-07 09:50:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:32,073 INFO L225 Difference]: With dead ends: 485 [2019-09-07 09:50:32,073 INFO L226 Difference]: Without dead ends: 274 [2019-09-07 09:50:32,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:50:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-09-07 09:50:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2019-09-07 09:50:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-07 09:50:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2019-09-07 09:50:32,084 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 251 [2019-09-07 09:50:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:32,084 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2019-09-07 09:50:32,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 09:50:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2019-09-07 09:50:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-09-07 09:50:32,087 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:32,087 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:32,087 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash -433684858, now seen corresponding path program 25 times [2019-09-07 09:50:32,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:32,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:32,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:32,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2019-09-07 09:50:32,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:32,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:32,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:50:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:32,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:50:32,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2019-09-07 09:50:32,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:32,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 09:50:32,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:50:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:50:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:50:32,622 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 24 states. [2019-09-07 09:50:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:32,691 INFO L93 Difference]: Finished difference Result 492 states and 504 transitions. [2019-09-07 09:50:32,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:50:32,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 263 [2019-09-07 09:50:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:32,693 INFO L225 Difference]: With dead ends: 492 [2019-09-07 09:50:32,693 INFO L226 Difference]: Without dead ends: 271 [2019-09-07 09:50:32,694 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:50:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-09-07 09:50:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2019-09-07 09:50:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-09-07 09:50:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 276 transitions. [2019-09-07 09:50:32,703 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 276 transitions. Word has length 263 [2019-09-07 09:50:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:32,703 INFO L475 AbstractCegarLoop]: Abstraction has 270 states and 276 transitions. [2019-09-07 09:50:32,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:50:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 276 transitions. [2019-09-07 09:50:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-09-07 09:50:32,705 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:32,705 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:32,705 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 776557732, now seen corresponding path program 26 times [2019-09-07 09:50:32,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:32,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:32,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:50:32,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2041 trivial. 0 not checked. [2019-09-07 09:50:33,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:33,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:50:33,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:50:33,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:50:33,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:33,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:50:33,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2019-09-07 09:50:33,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:33,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2019-09-07 09:50:33,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 09:50:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 09:50:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 09:50:33,727 INFO L87 Difference]: Start difference. First operand 270 states and 276 transitions. Second operand 45 states. [2019-09-07 09:50:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:34,258 INFO L93 Difference]: Finished difference Result 509 states and 526 transitions. [2019-09-07 09:50:34,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 09:50:34,259 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 265 [2019-09-07 09:50:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:34,261 INFO L225 Difference]: With dead ends: 509 [2019-09-07 09:50:34,261 INFO L226 Difference]: Without dead ends: 288 [2019-09-07 09:50:34,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 09:50:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-09-07 09:50:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2019-09-07 09:50:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2019-09-07 09:50:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 288 transitions. [2019-09-07 09:50:34,272 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 288 transitions. Word has length 265 [2019-09-07 09:50:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:34,272 INFO L475 AbstractCegarLoop]: Abstraction has 282 states and 288 transitions. [2019-09-07 09:50:34,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 09:50:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 288 transitions. [2019-09-07 09:50:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-09-07 09:50:34,274 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:34,274 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:34,274 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1294721000, now seen corresponding path program 27 times [2019-09-07 09:50:34,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:34,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:34,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:34,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:34,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2689 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2019-09-07 09:50:34,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:34,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:50:34,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000