java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:03:54,404 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:03:54,408 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:03:54,423 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:03:54,424 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:03:54,425 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:03:54,426 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:03:54,428 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:03:54,429 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:03:54,430 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:03:54,431 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:03:54,431 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:03:54,432 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:03:54,433 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:03:54,434 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:03:54,435 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:03:54,436 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:03:54,438 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:03:54,440 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:03:54,441 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:03:54,442 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:03:54,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:03:54,446 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:03:54,446 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:03:54,447 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:03:54,447 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:03:54,449 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:03:54,449 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:03:54,450 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:03:54,455 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:03:54,455 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:03:54,456 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:03:54,456 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:03:54,456 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:03:54,459 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:03:54,459 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:03:54,460 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:03:54,485 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:03:54,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:03:54,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:03:54,490 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:03:54,490 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:03:54,491 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:03:54,491 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:03:54,491 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:03:54,491 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:03:54,492 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:03:54,493 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:03:54,493 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:03:54,493 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:03:54,494 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:03:54,494 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:03:54,494 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:03:54,494 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:03:54,494 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:03:54,495 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:03:54,495 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:03:54,495 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:03:54,495 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:03:54,495 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:03:54,496 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:03:54,496 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:03:54,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:03:54,496 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:03:54,496 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:03:54,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:03:54,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:03:54,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:03:54,569 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:03:54,569 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:03:54,570 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label19_true-unreach-call.c [2018-10-24 16:03:54,633 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/71c9b1ca5/9c49f138aeab4f80b04c41bcd3a9dcaa/FLAGaea2d1692 [2018-10-24 16:03:55,198 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:03:55,199 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label19_true-unreach-call.c [2018-10-24 16:03:55,221 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/71c9b1ca5/9c49f138aeab4f80b04c41bcd3a9dcaa/FLAGaea2d1692 [2018-10-24 16:03:55,238 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/71c9b1ca5/9c49f138aeab4f80b04c41bcd3a9dcaa [2018-10-24 16:03:55,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:03:55,255 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:03:55,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:03:55,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:03:55,261 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:03:55,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:55" (1/1) ... [2018-10-24 16:03:55,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a9863c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:55, skipping insertion in model container [2018-10-24 16:03:55,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:55" (1/1) ... [2018-10-24 16:03:55,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:03:55,354 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:03:55,991 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:03:55,996 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:03:56,157 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:03:56,179 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:03:56,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56 WrapperNode [2018-10-24 16:03:56,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:03:56,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:03:56,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:03:56,182 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:03:56,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:03:56,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:03:56,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:03:56,473 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:03:56,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... [2018-10-24 16:03:56,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:03:56,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:03:56,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:03:56,602 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:03:56,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:03:56,669 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:03:56,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:03:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:04:01,661 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:04:01,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:04:01 BoogieIcfgContainer [2018-10-24 16:04:01,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:04:01,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:04:01,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:04:01,666 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:04:01,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:03:55" (1/3) ... [2018-10-24 16:04:01,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cbf616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:04:01, skipping insertion in model container [2018-10-24 16:04:01,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:56" (2/3) ... [2018-10-24 16:04:01,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cbf616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:04:01, skipping insertion in model container [2018-10-24 16:04:01,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:04:01" (3/3) ... [2018-10-24 16:04:01,671 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label19_true-unreach-call.c [2018-10-24 16:04:01,680 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:04:01,689 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:04:01,707 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:04:01,740 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:04:01,741 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:04:01,741 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:04:01,741 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:04:01,741 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:04:01,742 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:04:01,742 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:04:01,742 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:04:01,742 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:04:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 16:04:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-24 16:04:01,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:01,777 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:01,779 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:01,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1848943538, now seen corresponding path program 1 times [2018-10-24 16:04:01,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:01,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:01,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:01,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:01,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:02,343 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 16:04:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:02,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:02,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:02,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:02,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:02,441 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-24 16:04:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:05,924 INFO L93 Difference]: Finished difference Result 964 states and 1743 transitions. [2018-10-24 16:04:05,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:05,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-10-24 16:04:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:05,951 INFO L225 Difference]: With dead ends: 964 [2018-10-24 16:04:05,951 INFO L226 Difference]: Without dead ends: 673 [2018-10-24 16:04:05,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2018-10-24 16:04:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 658. [2018-10-24 16:04:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2018-10-24 16:04:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1087 transitions. [2018-10-24 16:04:06,052 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1087 transitions. Word has length 57 [2018-10-24 16:04:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 658 states and 1087 transitions. [2018-10-24 16:04:06,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1087 transitions. [2018-10-24 16:04:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-24 16:04:06,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:06,060 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:06,060 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:06,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash -333980735, now seen corresponding path program 1 times [2018-10-24 16:04:06,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:06,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:06,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:06,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:06,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:06,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:06,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:06,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:06,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:06,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:06,463 INFO L87 Difference]: Start difference. First operand 658 states and 1087 transitions. Second operand 4 states. [2018-10-24 16:04:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:11,089 INFO L93 Difference]: Finished difference Result 2453 states and 4148 transitions. [2018-10-24 16:04:11,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:11,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2018-10-24 16:04:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:11,101 INFO L225 Difference]: With dead ends: 2453 [2018-10-24 16:04:11,102 INFO L226 Difference]: Without dead ends: 1797 [2018-10-24 16:04:11,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2018-10-24 16:04:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1214. [2018-10-24 16:04:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2018-10-24 16:04:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1787 transitions. [2018-10-24 16:04:11,157 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1787 transitions. Word has length 131 [2018-10-24 16:04:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:11,158 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 1787 transitions. [2018-10-24 16:04:11,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1787 transitions. [2018-10-24 16:04:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-24 16:04:11,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:11,166 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:11,166 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:11,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash -58515139, now seen corresponding path program 1 times [2018-10-24 16:04:11,167 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:11,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:11,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:11,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:11,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:11,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:11,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:04:11,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:11,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:11,353 INFO L87 Difference]: Start difference. First operand 1214 states and 1787 transitions. Second operand 3 states. [2018-10-24 16:04:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:14,195 INFO L93 Difference]: Finished difference Result 3538 states and 5244 transitions. [2018-10-24 16:04:14,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:14,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2018-10-24 16:04:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:14,209 INFO L225 Difference]: With dead ends: 3538 [2018-10-24 16:04:14,210 INFO L226 Difference]: Without dead ends: 2326 [2018-10-24 16:04:14,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2018-10-24 16:04:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2326. [2018-10-24 16:04:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-10-24 16:04:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3212 transitions. [2018-10-24 16:04:14,263 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3212 transitions. Word has length 175 [2018-10-24 16:04:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:14,264 INFO L481 AbstractCegarLoop]: Abstraction has 2326 states and 3212 transitions. [2018-10-24 16:04:14,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3212 transitions. [2018-10-24 16:04:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-24 16:04:14,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:14,268 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:14,268 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:14,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash 366212986, now seen corresponding path program 1 times [2018-10-24 16:04:14,269 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:14,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:14,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:14,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:14,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-10-24 16:04:14,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:14,681 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:04:14,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:14,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-24 16:04:14,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:04:14,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-24 16:04:14,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:14,945 INFO L87 Difference]: Start difference. First operand 2326 states and 3212 transitions. Second operand 4 states. [2018-10-24 16:04:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:19,168 INFO L93 Difference]: Finished difference Result 6878 states and 9280 transitions. [2018-10-24 16:04:19,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:19,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2018-10-24 16:04:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:19,199 INFO L225 Difference]: With dead ends: 6878 [2018-10-24 16:04:19,199 INFO L226 Difference]: Without dead ends: 4554 [2018-10-24 16:04:19,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2018-10-24 16:04:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 4553. [2018-10-24 16:04:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4553 states. [2018-10-24 16:04:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 5818 transitions. [2018-10-24 16:04:19,366 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 5818 transitions. Word has length 201 [2018-10-24 16:04:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:19,367 INFO L481 AbstractCegarLoop]: Abstraction has 4553 states and 5818 transitions. [2018-10-24 16:04:19,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 5818 transitions. [2018-10-24 16:04:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-10-24 16:04:19,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:19,373 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:19,374 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:19,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1905852891, now seen corresponding path program 1 times [2018-10-24 16:04:19,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:19,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:19,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:19,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:19,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:19,913 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-24 16:04:20,198 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-10-24 16:04:20,682 WARN L179 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2018-10-24 16:04:20,921 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2018-10-24 16:04:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:21,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:21,042 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:04:21,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:21,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:22,195 WARN L179 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 29 [2018-10-24 16:04:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 82 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:22,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:04:22,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-10-24 16:04:22,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:04:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:04:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:04:22,430 INFO L87 Difference]: Start difference. First operand 4553 states and 5818 transitions. Second operand 11 states. [2018-10-24 16:04:24,409 WARN L179 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-24 16:04:24,995 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:04:25,781 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-24 16:04:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:44,479 INFO L93 Difference]: Finished difference Result 27089 states and 34823 transitions. [2018-10-24 16:04:44,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 16:04:44,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 240 [2018-10-24 16:04:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:44,571 INFO L225 Difference]: With dead ends: 27089 [2018-10-24 16:04:44,571 INFO L226 Difference]: Without dead ends: 22723 [2018-10-24 16:04:44,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 16:04:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22723 states. [2018-10-24 16:04:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22723 to 16230. [2018-10-24 16:04:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16230 states. [2018-10-24 16:04:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16230 states to 16230 states and 19547 transitions. [2018-10-24 16:04:44,929 INFO L78 Accepts]: Start accepts. Automaton has 16230 states and 19547 transitions. Word has length 240 [2018-10-24 16:04:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:44,930 INFO L481 AbstractCegarLoop]: Abstraction has 16230 states and 19547 transitions. [2018-10-24 16:04:44,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:04:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 16230 states and 19547 transitions. [2018-10-24 16:04:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 16:04:44,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:44,942 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:44,942 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:44,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1951416041, now seen corresponding path program 1 times [2018-10-24 16:04:44,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:44,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:44,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:45,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:45,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:45,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:04:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:04:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:45,407 INFO L87 Difference]: Start difference. First operand 16230 states and 19547 transitions. Second operand 5 states. [2018-10-24 16:04:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:49,597 INFO L93 Difference]: Finished difference Result 46017 states and 56239 transitions. [2018-10-24 16:04:49,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:04:49,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-10-24 16:04:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:49,651 INFO L225 Difference]: With dead ends: 46017 [2018-10-24 16:04:49,652 INFO L226 Difference]: Without dead ends: 29974 [2018-10-24 16:04:49,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29974 states. [2018-10-24 16:04:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29974 to 24204. [2018-10-24 16:04:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24204 states. [2018-10-24 16:04:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 28532 transitions. [2018-10-24 16:04:50,050 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 28532 transitions. Word has length 251 [2018-10-24 16:04:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:50,050 INFO L481 AbstractCegarLoop]: Abstraction has 24204 states and 28532 transitions. [2018-10-24 16:04:50,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:04:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 28532 transitions. [2018-10-24 16:04:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-24 16:04:50,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:50,076 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:50,077 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:50,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 959638500, now seen corresponding path program 1 times [2018-10-24 16:04:50,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:50,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:50,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:50,424 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 16:04:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-10-24 16:04:50,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:50,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:50,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:50,507 INFO L87 Difference]: Start difference. First operand 24204 states and 28532 transitions. Second operand 4 states. [2018-10-24 16:04:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:52,801 INFO L93 Difference]: Finished difference Result 51010 states and 60682 transitions. [2018-10-24 16:04:52,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:52,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2018-10-24 16:04:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:52,854 INFO L225 Difference]: With dead ends: 51010 [2018-10-24 16:04:52,855 INFO L226 Difference]: Without dead ends: 26993 [2018-10-24 16:04:52,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2018-10-24 16:04:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26794. [2018-10-24 16:04:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26794 states. [2018-10-24 16:04:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26794 states to 26794 states and 31329 transitions. [2018-10-24 16:04:53,258 INFO L78 Accepts]: Start accepts. Automaton has 26794 states and 31329 transitions. Word has length 330 [2018-10-24 16:04:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:53,259 INFO L481 AbstractCegarLoop]: Abstraction has 26794 states and 31329 transitions. [2018-10-24 16:04:53,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 26794 states and 31329 transitions. [2018-10-24 16:04:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-24 16:04:53,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:53,285 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:53,286 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:53,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -92001179, now seen corresponding path program 1 times [2018-10-24 16:04:53,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:53,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:53,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:53,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:53,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:54,063 WARN L179 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:04:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 16:04:54,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:54,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:04:54,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:04:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:04:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:54,146 INFO L87 Difference]: Start difference. First operand 26794 states and 31329 transitions. Second operand 5 states. [2018-10-24 16:04:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:56,141 INFO L93 Difference]: Finished difference Result 54533 states and 63934 transitions. [2018-10-24 16:04:56,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:04:56,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2018-10-24 16:04:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:56,190 INFO L225 Difference]: With dead ends: 54533 [2018-10-24 16:04:56,190 INFO L226 Difference]: Without dead ends: 27926 [2018-10-24 16:04:56,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27926 states. [2018-10-24 16:04:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27926 to 26798. [2018-10-24 16:04:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26798 states. [2018-10-24 16:04:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26798 states to 26798 states and 30756 transitions. [2018-10-24 16:04:56,560 INFO L78 Accepts]: Start accepts. Automaton has 26798 states and 30756 transitions. Word has length 333 [2018-10-24 16:04:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:56,561 INFO L481 AbstractCegarLoop]: Abstraction has 26798 states and 30756 transitions. [2018-10-24 16:04:56,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:04:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 26798 states and 30756 transitions. [2018-10-24 16:04:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-10-24 16:04:56,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:56,581 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:56,581 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:56,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1057714593, now seen corresponding path program 1 times [2018-10-24 16:04:56,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:56,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:56,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:56,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:56,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-24 16:04:56,953 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:56,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:04:56,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:56,955 INFO L87 Difference]: Start difference. First operand 26798 states and 30756 transitions. Second operand 3 states. [2018-10-24 16:04:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:58,153 INFO L93 Difference]: Finished difference Result 52847 states and 60518 transitions. [2018-10-24 16:04:58,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:58,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2018-10-24 16:04:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:58,180 INFO L225 Difference]: With dead ends: 52847 [2018-10-24 16:04:58,181 INFO L226 Difference]: Without dead ends: 26236 [2018-10-24 16:04:58,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26236 states. [2018-10-24 16:04:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26236 to 26234. [2018-10-24 16:04:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26234 states. [2018-10-24 16:04:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26234 states to 26234 states and 29945 transitions. [2018-10-24 16:04:58,513 INFO L78 Accepts]: Start accepts. Automaton has 26234 states and 29945 transitions. Word has length 341 [2018-10-24 16:04:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:58,514 INFO L481 AbstractCegarLoop]: Abstraction has 26234 states and 29945 transitions. [2018-10-24 16:04:58,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26234 states and 29945 transitions. [2018-10-24 16:04:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-10-24 16:04:58,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:58,546 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:58,547 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:58,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1344011755, now seen corresponding path program 1 times [2018-10-24 16:04:58,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:58,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:58,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:58,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:58,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 136 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:59,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:59,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:04:59,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:59,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-10-24 16:04:59,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:04:59,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2018-10-24 16:04:59,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:04:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:04:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:04:59,874 INFO L87 Difference]: Start difference. First operand 26234 states and 29945 transitions. Second operand 6 states. [2018-10-24 16:05:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:04,194 INFO L93 Difference]: Finished difference Result 51736 states and 59045 transitions. [2018-10-24 16:05:04,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:05:04,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 381 [2018-10-24 16:05:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:04,219 INFO L225 Difference]: With dead ends: 51736 [2018-10-24 16:05:04,220 INFO L226 Difference]: Without dead ends: 25689 [2018-10-24 16:05:04,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:05:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25689 states. [2018-10-24 16:05:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25689 to 20469. [2018-10-24 16:05:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20469 states. [2018-10-24 16:05:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20469 states to 20469 states and 23386 transitions. [2018-10-24 16:05:04,478 INFO L78 Accepts]: Start accepts. Automaton has 20469 states and 23386 transitions. Word has length 381 [2018-10-24 16:05:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:04,479 INFO L481 AbstractCegarLoop]: Abstraction has 20469 states and 23386 transitions. [2018-10-24 16:05:04,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:05:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 20469 states and 23386 transitions. [2018-10-24 16:05:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-10-24 16:05:04,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:04,497 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:04,497 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:04,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1940323520, now seen corresponding path program 1 times [2018-10-24 16:05:04,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:04,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:04,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:04,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:04,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 314 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-24 16:05:04,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:04,997 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:05,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:05,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-10-24 16:05:05,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:05:05,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-10-24 16:05:05,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:05:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:05:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:05:05,235 INFO L87 Difference]: Start difference. First operand 20469 states and 23386 transitions. Second operand 4 states. [2018-10-24 16:05:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:06,868 INFO L93 Difference]: Finished difference Result 40380 states and 46150 transitions. [2018-10-24 16:05:06,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:05:06,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2018-10-24 16:05:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:06,888 INFO L225 Difference]: With dead ends: 40380 [2018-10-24 16:05:06,889 INFO L226 Difference]: Without dead ends: 20283 [2018-10-24 16:05:06,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:05:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2018-10-24 16:05:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 19910. [2018-10-24 16:05:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19910 states. [2018-10-24 16:05:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19910 states to 19910 states and 22631 transitions. [2018-10-24 16:05:07,099 INFO L78 Accepts]: Start accepts. Automaton has 19910 states and 22631 transitions. Word has length 397 [2018-10-24 16:05:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:07,100 INFO L481 AbstractCegarLoop]: Abstraction has 19910 states and 22631 transitions. [2018-10-24 16:05:07,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:05:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19910 states and 22631 transitions. [2018-10-24 16:05:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-10-24 16:05:07,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:07,115 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:07,116 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:07,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash 260564265, now seen corresponding path program 1 times [2018-10-24 16:05:07,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:07,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:07,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:07,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:07,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 426 proven. 79 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-24 16:05:07,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:07,467 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:07,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:07,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 426 proven. 79 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-24 16:05:07,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:05:07,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:05:07,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:05:07,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:05:07,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:05:07,872 INFO L87 Difference]: Start difference. First operand 19910 states and 22631 transitions. Second operand 5 states. [2018-10-24 16:05:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:11,386 INFO L93 Difference]: Finished difference Result 44099 states and 50018 transitions. [2018-10-24 16:05:11,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:05:11,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 434 [2018-10-24 16:05:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:11,413 INFO L225 Difference]: With dead ends: 44099 [2018-10-24 16:05:11,413 INFO L226 Difference]: Without dead ends: 24561 [2018-10-24 16:05:11,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 433 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:05:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24561 states. [2018-10-24 16:05:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24561 to 20833. [2018-10-24 16:05:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20833 states. [2018-10-24 16:05:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 23449 transitions. [2018-10-24 16:05:11,616 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 23449 transitions. Word has length 434 [2018-10-24 16:05:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:11,616 INFO L481 AbstractCegarLoop]: Abstraction has 20833 states and 23449 transitions. [2018-10-24 16:05:11,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:05:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 23449 transitions. [2018-10-24 16:05:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-10-24 16:05:11,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:11,640 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:11,640 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:11,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1558517667, now seen corresponding path program 1 times [2018-10-24 16:05:11,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:11,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:11,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:11,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:11,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 311 proven. 314 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:05:12,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:12,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:12,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:12,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 361 proven. 264 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:05:13,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:05:13,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-24 16:05:13,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:05:13,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:05:13,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:05:13,116 INFO L87 Difference]: Start difference. First operand 20833 states and 23449 transitions. Second operand 8 states. [2018-10-24 16:05:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:19,051 INFO L93 Difference]: Finished difference Result 50791 states and 57253 transitions. [2018-10-24 16:05:19,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:05:19,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 546 [2018-10-24 16:05:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:19,080 INFO L225 Difference]: With dead ends: 50791 [2018-10-24 16:05:19,080 INFO L226 Difference]: Without dead ends: 30330 [2018-10-24 16:05:19,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 543 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:05:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30330 states. [2018-10-24 16:05:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30330 to 26598. [2018-10-24 16:05:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26598 states. [2018-10-24 16:05:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26598 states to 26598 states and 29597 transitions. [2018-10-24 16:05:19,338 INFO L78 Accepts]: Start accepts. Automaton has 26598 states and 29597 transitions. Word has length 546 [2018-10-24 16:05:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:19,339 INFO L481 AbstractCegarLoop]: Abstraction has 26598 states and 29597 transitions. [2018-10-24 16:05:19,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:05:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 26598 states and 29597 transitions. [2018-10-24 16:05:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2018-10-24 16:05:19,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:19,359 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:19,360 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:19,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash 606563915, now seen corresponding path program 1 times [2018-10-24 16:05:19,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:19,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:19,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 373 proven. 55 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-10-24 16:05:20,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:20,020 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 16:05:20,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:20,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:20,463 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 16:05:33,655 WARN L179 SmtUtils]: Spent 13.02 s on a formula simplification. DAG size of input: 157 DAG size of output: 29 [2018-10-24 16:05:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 229 proven. 199 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-10-24 16:05:34,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:05:34,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-24 16:05:34,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:05:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:05:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:05:34,441 INFO L87 Difference]: Start difference. First operand 26598 states and 29597 transitions. Second operand 11 states. [2018-10-24 16:05:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:44,277 INFO L93 Difference]: Finished difference Result 61041 states and 67875 transitions. [2018-10-24 16:05:44,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 16:05:44,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 557 [2018-10-24 16:05:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:44,312 INFO L225 Difference]: With dead ends: 61041 [2018-10-24 16:05:44,312 INFO L226 Difference]: Without dead ends: 34630 [2018-10-24 16:05:44,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2018-10-24 16:05:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34630 states. [2018-10-24 16:05:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34630 to 28095. [2018-10-24 16:05:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28095 states. [2018-10-24 16:05:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28095 states to 28095 states and 30720 transitions. [2018-10-24 16:05:44,600 INFO L78 Accepts]: Start accepts. Automaton has 28095 states and 30720 transitions. Word has length 557 [2018-10-24 16:05:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:44,600 INFO L481 AbstractCegarLoop]: Abstraction has 28095 states and 30720 transitions. [2018-10-24 16:05:44,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:05:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28095 states and 30720 transitions. [2018-10-24 16:05:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2018-10-24 16:05:44,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:44,623 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:44,623 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:44,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1408517502, now seen corresponding path program 1 times [2018-10-24 16:05:44,624 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:44,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:44,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:44,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:44,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:45,016 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-24 16:05:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2018-10-24 16:05:45,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:05:45,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:05:45,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:05:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:05:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:05:45,293 INFO L87 Difference]: Start difference. First operand 28095 states and 30720 transitions. Second operand 4 states. [2018-10-24 16:05:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:47,203 INFO L93 Difference]: Finished difference Result 52475 states and 57507 transitions. [2018-10-24 16:05:47,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:05:47,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 569 [2018-10-24 16:05:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:47,230 INFO L225 Difference]: With dead ends: 52475 [2018-10-24 16:05:47,230 INFO L226 Difference]: Without dead ends: 25870 [2018-10-24 16:05:47,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:05:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25870 states. [2018-10-24 16:05:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25870 to 25116. [2018-10-24 16:05:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25116 states. [2018-10-24 16:05:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25116 states to 25116 states and 27196 transitions. [2018-10-24 16:05:47,496 INFO L78 Accepts]: Start accepts. Automaton has 25116 states and 27196 transitions. Word has length 569 [2018-10-24 16:05:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:47,496 INFO L481 AbstractCegarLoop]: Abstraction has 25116 states and 27196 transitions. [2018-10-24 16:05:47,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:05:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 25116 states and 27196 transitions. [2018-10-24 16:05:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2018-10-24 16:05:47,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:47,513 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:47,513 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:47,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2011769998, now seen corresponding path program 1 times [2018-10-24 16:05:47,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:47,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:47,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:48,071 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:05:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 669 proven. 239 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-10-24 16:05:48,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:48,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:48,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 669 proven. 239 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-10-24 16:05:49,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:05:49,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:05:49,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:05:49,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:05:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:05:49,096 INFO L87 Difference]: Start difference. First operand 25116 states and 27196 transitions. Second operand 5 states. [2018-10-24 16:05:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:05:52,313 INFO L93 Difference]: Finished difference Result 60460 states and 65333 transitions. [2018-10-24 16:05:52,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:05:52,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 618 [2018-10-24 16:05:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:05:52,340 INFO L225 Difference]: With dead ends: 60460 [2018-10-24 16:05:52,340 INFO L226 Difference]: Without dead ends: 25662 [2018-10-24 16:05:52,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 617 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:05:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2018-10-24 16:05:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 18748. [2018-10-24 16:05:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18748 states. [2018-10-24 16:05:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18748 states to 18748 states and 19857 transitions. [2018-10-24 16:05:52,846 INFO L78 Accepts]: Start accepts. Automaton has 18748 states and 19857 transitions. Word has length 618 [2018-10-24 16:05:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:05:52,847 INFO L481 AbstractCegarLoop]: Abstraction has 18748 states and 19857 transitions. [2018-10-24 16:05:52,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:05:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 18748 states and 19857 transitions. [2018-10-24 16:05:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2018-10-24 16:05:52,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:05:52,865 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:05:52,866 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:05:52,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:05:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1089060527, now seen corresponding path program 1 times [2018-10-24 16:05:52,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:05:52,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:05:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:52,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:05:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 1168 proven. 205 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2018-10-24 16:05:54,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:54,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:54,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:54,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:06:19,188 WARN L179 SmtUtils]: Spent 18.48 s on a formula simplification. DAG size of input: 581 DAG size of output: 135 [2018-10-24 16:06:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 748 proven. 0 refuted. 55 times theorem prover too weak. 1339 trivial. 0 not checked. [2018-10-24 16:06:21,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:06:21,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2018-10-24 16:06:21,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:06:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:06:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=18, Unknown=3, NotChecked=0, Total=30 [2018-10-24 16:06:21,883 INFO L87 Difference]: Start difference. First operand 18748 states and 19857 transitions. Second operand 6 states. [2018-10-24 16:06:49,335 WARN L179 SmtUtils]: Spent 16.39 s on a formula simplification. DAG size of input: 140 DAG size of output: 63 Received shutdown request... [2018-10-24 16:08:00,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:08:00,987 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:08:00,993 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:08:00,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:08:00 BoogieIcfgContainer [2018-10-24 16:08:00,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:08:00,994 INFO L168 Benchmark]: Toolchain (without parser) took 245741.04 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-24 16:08:00,995 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:08:00,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 924.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-10-24 16:08:00,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 290.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:08:00,997 INFO L168 Benchmark]: Boogie Preprocessor took 127.69 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:08:00,997 INFO L168 Benchmark]: RCFGBuilder took 5060.74 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 187.0 MB). Peak memory consumption was 187.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:08:00,998 INFO L168 Benchmark]: TraceAbstraction took 239330.38 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -459.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-24 16:08:01,002 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 924.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 290.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.69 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5060.74 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 187.0 MB). Peak memory consumption was 187.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239330.38 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -459.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 174]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 174). Cancelled while BasicCegarLoop was constructing difference of abstraction (18748states) and FLOYD_HOARE automaton (currently 6 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (1123 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 239.2s OverallTime, 17 OverallIterations, 8 TraceHistogramMax, 177.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3503 SDtfs, 16000 SDslu, 2763 SDs, 0 SdLazy, 41381 SolverSat, 6990 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 141.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4250 GetRequests, 4133 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 65.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28095occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 16 MinimizatonAttempts, 41447 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 52.2s InterpolantComputationTime, 10425 NumberOfCodeBlocks, 10425 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 10399 ConstructedInterpolants, 209 QuantifiedInterpolants, 31264567 SizeOfPredicates, 17 NumberOfNonLiveVariables, 5403 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 26 InterpolantComputations, 11 PerfectInterpolantSequences, 13631/15844 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown