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/Problem14_label48_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:31:04,090 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:31:04,093 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:31:04,109 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:31:04,109 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:31:04,111 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:31:04,114 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:31:04,117 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:31:04,119 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:31:04,120 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:31:04,122 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:31:04,122 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:31:04,124 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:31:04,125 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:31:04,128 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:31:04,135 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:31:04,137 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:31:04,139 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:31:04,142 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:31:04,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:31:04,144 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:31:04,146 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:31:04,148 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:31:04,156 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 16:31:04,176 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:31:04,176 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:31:04,178 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:31:04,178 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:31:04,179 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:31:04,179 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:31:04,179 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:31:04,179 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:31:04,179 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:31:04,180 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:31:04,181 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:31:04,181 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:31:04,181 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:31:04,181 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:31:04,181 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:31:04,182 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:31:04,182 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:31:04,182 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:31:04,182 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:31:04,183 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:31:04,184 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:31:04,184 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:31:04,184 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:31:04,184 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:31:04,185 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:31:04,185 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:31:04,185 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:31:04,185 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:31:04,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:31:04,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:31:04,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:31:04,275 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:31:04,276 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:31:04,277 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label48_true-unreach-call_false-termination.c [2018-10-24 16:31:04,348 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74265af79/e5260346db9842118e5eb0c1f063a78d/FLAGf1e1a1bc9 [2018-10-24 16:31:04,942 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:31:04,944 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label48_true-unreach-call_false-termination.c [2018-10-24 16:31:04,961 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74265af79/e5260346db9842118e5eb0c1f063a78d/FLAGf1e1a1bc9 [2018-10-24 16:31:04,984 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74265af79/e5260346db9842118e5eb0c1f063a78d [2018-10-24 16:31:04,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:31:05,001 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:31:05,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:31:05,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:31:05,009 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:31:05,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:31:04" (1/1) ... [2018-10-24 16:31:05,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a8effd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05, skipping insertion in model container [2018-10-24 16:31:05,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:31:04" (1/1) ... [2018-10-24 16:31:05,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:31:05,105 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:31:05,600 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:31:05,604 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:31:05,758 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:31:05,783 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:31:05,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05 WrapperNode [2018-10-24 16:31:05,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:31:05,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:31:05,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:31:05,787 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:31:05,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:05,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:31:06,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:31:06,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:31:06,065 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:31:06,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (1/1) ... [2018-10-24 16:31:06,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:31:06,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:31:06,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:31:06,185 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:31:06,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (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 16:31:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:31:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:31:06,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:31:09,689 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:31:09,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:31:09 BoogieIcfgContainer [2018-10-24 16:31:09,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:31:09,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:31:09,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:31:09,695 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:31:09,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:31:04" (1/3) ... [2018-10-24 16:31:09,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15761198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:31:09, skipping insertion in model container [2018-10-24 16:31:09,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:05" (2/3) ... [2018-10-24 16:31:09,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15761198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:31:09, skipping insertion in model container [2018-10-24 16:31:09,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:31:09" (3/3) ... [2018-10-24 16:31:09,699 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label48_true-unreach-call_false-termination.c [2018-10-24 16:31:09,710 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:31:09,719 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:31:09,737 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:31:09,775 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:31:09,776 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:31:09,776 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:31:09,776 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:31:09,776 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:31:09,777 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:31:09,777 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:31:09,777 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:31:09,777 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:31:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2018-10-24 16:31:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 16:31:09,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:09,812 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] [2018-10-24 16:31:09,814 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:09,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash 861450858, now seen corresponding path program 1 times [2018-10-24 16:31:09,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:09,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:09,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:09,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:09,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:10,362 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 16:31:10,879 WARN L179 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-10-24 16:31:10,954 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 16:31:10,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:31:10,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:31:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:31:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:31:10,983 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 6 states. [2018-10-24 16:31:11,175 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:31:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:16,060 INFO L93 Difference]: Finished difference Result 1038 states and 1923 transitions. [2018-10-24 16:31:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:31:16,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2018-10-24 16:31:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:16,088 INFO L225 Difference]: With dead ends: 1038 [2018-10-24 16:31:16,089 INFO L226 Difference]: Without dead ends: 782 [2018-10-24 16:31:16,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:31:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2018-10-24 16:31:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2018-10-24 16:31:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2018-10-24 16:31:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1281 transitions. [2018-10-24 16:31:16,203 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1281 transitions. Word has length 39 [2018-10-24 16:31:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:16,203 INFO L481 AbstractCegarLoop]: Abstraction has 782 states and 1281 transitions. [2018-10-24 16:31:16,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:31:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1281 transitions. [2018-10-24 16:31:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-24 16:31:16,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:16,215 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, 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] [2018-10-24 16:31:16,215 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:16,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash -52020750, now seen corresponding path program 1 times [2018-10-24 16:31:16,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:16,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:16,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:16,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:16,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-10-24 16:31:16,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:16,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:31:16,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:31:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:31:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:16,520 INFO L87 Difference]: Start difference. First operand 782 states and 1281 transitions. Second operand 4 states. [2018-10-24 16:31:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:18,526 INFO L93 Difference]: Finished difference Result 1918 states and 3226 transitions. [2018-10-24 16:31:18,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:31:18,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2018-10-24 16:31:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:18,535 INFO L225 Difference]: With dead ends: 1918 [2018-10-24 16:31:18,535 INFO L226 Difference]: Without dead ends: 1138 [2018-10-24 16:31:18,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2018-10-24 16:31:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2018-10-24 16:31:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2018-10-24 16:31:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1701 transitions. [2018-10-24 16:31:18,582 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1701 transitions. Word has length 189 [2018-10-24 16:31:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:18,582 INFO L481 AbstractCegarLoop]: Abstraction has 1138 states and 1701 transitions. [2018-10-24 16:31:18,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:31:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1701 transitions. [2018-10-24 16:31:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-24 16:31:18,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:18,596 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, 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] [2018-10-24 16:31:18,597 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:18,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 107358408, now seen corresponding path program 1 times [2018-10-24 16:31:18,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:18,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:18,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:18,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:18,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:19,058 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-24 16:31:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 141 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 16:31:19,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:31:19,150 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 16:31:19,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:19,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:31:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 16:31:19,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:31:19,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:31:19,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:31:19,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:31:19,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:31:19,530 INFO L87 Difference]: Start difference. First operand 1138 states and 1701 transitions. Second operand 6 states. [2018-10-24 16:31:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:27,600 INFO L93 Difference]: Finished difference Result 4080 states and 6374 transitions. [2018-10-24 16:31:27,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:31:27,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-10-24 16:31:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:27,617 INFO L225 Difference]: With dead ends: 4080 [2018-10-24 16:31:27,617 INFO L226 Difference]: Without dead ends: 2763 [2018-10-24 16:31:27,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:31:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2018-10-24 16:31:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1853. [2018-10-24 16:31:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1853 states. [2018-10-24 16:31:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2181 transitions. [2018-10-24 16:31:27,673 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2181 transitions. Word has length 212 [2018-10-24 16:31:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:27,674 INFO L481 AbstractCegarLoop]: Abstraction has 1853 states and 2181 transitions. [2018-10-24 16:31:27,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:31:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2181 transitions. [2018-10-24 16:31:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-24 16:31:27,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:27,684 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:31:27,684 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:27,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:27,685 INFO L82 PathProgramCache]: Analyzing trace with hash -281300119, now seen corresponding path program 1 times [2018-10-24 16:31:27,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:27,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:27,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:27,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:27,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-10-24 16:31:28,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:28,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:31:28,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:31:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:31:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:28,381 INFO L87 Difference]: Start difference. First operand 1853 states and 2181 transitions. Second operand 4 states. [2018-10-24 16:31:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:30,458 INFO L93 Difference]: Finished difference Result 5852 states and 7101 transitions. [2018-10-24 16:31:30,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:31:30,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2018-10-24 16:31:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:30,480 INFO L225 Difference]: With dead ends: 5852 [2018-10-24 16:31:30,480 INFO L226 Difference]: Without dead ends: 4180 [2018-10-24 16:31:30,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 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 16:31:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2018-10-24 16:31:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4001. [2018-10-24 16:31:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2018-10-24 16:31:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4667 transitions. [2018-10-24 16:31:30,557 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4667 transitions. Word has length 414 [2018-10-24 16:31:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:30,558 INFO L481 AbstractCegarLoop]: Abstraction has 4001 states and 4667 transitions. [2018-10-24 16:31:30,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:31:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4667 transitions. [2018-10-24 16:31:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2018-10-24 16:31:30,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:30,575 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, 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, 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] [2018-10-24 16:31:30,575 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:30,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -17135963, now seen corresponding path program 1 times [2018-10-24 16:31:30,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:30,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:30,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:30,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:30,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:31,236 WARN L179 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:31:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-24 16:31:31,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:31,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:31:31,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:31:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:31:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:31,416 INFO L87 Difference]: Start difference. First operand 4001 states and 4667 transitions. Second operand 4 states. [2018-10-24 16:31:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:33,310 INFO L93 Difference]: Finished difference Result 8895 states and 10492 transitions. [2018-10-24 16:31:33,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:31:33,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 511 [2018-10-24 16:31:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:33,332 INFO L225 Difference]: With dead ends: 8895 [2018-10-24 16:31:33,332 INFO L226 Difference]: Without dead ends: 5075 [2018-10-24 16:31:33,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2018-10-24 16:31:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 5075. [2018-10-24 16:31:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5075 states. [2018-10-24 16:31:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 5704 transitions. [2018-10-24 16:31:33,433 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 5704 transitions. Word has length 511 [2018-10-24 16:31:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:33,434 INFO L481 AbstractCegarLoop]: Abstraction has 5075 states and 5704 transitions. [2018-10-24 16:31:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:31:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 5704 transitions. [2018-10-24 16:31:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-10-24 16:31:33,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:33,454 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, 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, 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, 1, 1, 1, 1, 1, 1, 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 16:31:33,454 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:33,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash -951535334, now seen corresponding path program 1 times [2018-10-24 16:31:33,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:33,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:33,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:33,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:33,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 652 proven. 46 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-10-24 16:31:34,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:31:34,449 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 16:31:34,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:34,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:31:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 675 proven. 23 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-10-24 16:31:35,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:31:35,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-24 16:31:35,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:31:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:31:35,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:31:35,193 INFO L87 Difference]: Start difference. First operand 5075 states and 5704 transitions. Second operand 9 states. [2018-10-24 16:31:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:41,935 INFO L93 Difference]: Finished difference Result 10228 states and 11489 transitions. [2018-10-24 16:31:41,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:31:41,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 538 [2018-10-24 16:31:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:41,958 INFO L225 Difference]: With dead ends: 10228 [2018-10-24 16:31:41,958 INFO L226 Difference]: Without dead ends: 5154 [2018-10-24 16:31:41,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 536 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:31:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5154 states. [2018-10-24 16:31:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5154 to 4895. [2018-10-24 16:31:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4895 states. [2018-10-24 16:31:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 5500 transitions. [2018-10-24 16:31:42,049 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 5500 transitions. Word has length 538 [2018-10-24 16:31:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:42,049 INFO L481 AbstractCegarLoop]: Abstraction has 4895 states and 5500 transitions. [2018-10-24 16:31:42,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:31:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 5500 transitions. [2018-10-24 16:31:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-10-24 16:31:42,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:42,060 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-10-24 16:31:42,060 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:42,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash 494488420, now seen corresponding path program 1 times [2018-10-24 16:31:42,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:42,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:42,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:42,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:42,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 804 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-24 16:31:42,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:42,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:31:42,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:31:42,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:31:42,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:31:42,710 INFO L87 Difference]: Start difference. First operand 4895 states and 5500 transitions. Second operand 3 states. [2018-10-24 16:31:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:43,809 INFO L93 Difference]: Finished difference Result 11757 states and 13435 transitions. [2018-10-24 16:31:43,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:31:43,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 625 [2018-10-24 16:31:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:43,841 INFO L225 Difference]: With dead ends: 11757 [2018-10-24 16:31:43,841 INFO L226 Difference]: Without dead ends: 7043 [2018-10-24 16:31:43,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:31:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2018-10-24 16:31:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 7043. [2018-10-24 16:31:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7043 states. [2018-10-24 16:31:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8020 transitions. [2018-10-24 16:31:43,954 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8020 transitions. Word has length 625 [2018-10-24 16:31:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:43,955 INFO L481 AbstractCegarLoop]: Abstraction has 7043 states and 8020 transitions. [2018-10-24 16:31:43,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:31:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8020 transitions. [2018-10-24 16:31:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-10-24 16:31:43,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:43,966 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:31:43,967 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:43,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:43,967 INFO L82 PathProgramCache]: Analyzing trace with hash 555470015, now seen corresponding path program 1 times [2018-10-24 16:31:43,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:43,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:43,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:43,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:43,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 944 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-10-24 16:31:44,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:44,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:31:44,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:31:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:31:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:31:44,964 INFO L87 Difference]: Start difference. First operand 7043 states and 8020 transitions. Second operand 7 states. [2018-10-24 16:31:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:46,926 INFO L93 Difference]: Finished difference Result 14677 states and 16709 transitions. [2018-10-24 16:31:46,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:31:46,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 628 [2018-10-24 16:31:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:46,955 INFO L225 Difference]: With dead ends: 14677 [2018-10-24 16:31:46,955 INFO L226 Difference]: Without dead ends: 7219 [2018-10-24 16:31:46,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:31:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7219 states. [2018-10-24 16:31:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7219 to 6861. [2018-10-24 16:31:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6861 states. [2018-10-24 16:31:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 7702 transitions. [2018-10-24 16:31:47,064 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 7702 transitions. Word has length 628 [2018-10-24 16:31:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:47,065 INFO L481 AbstractCegarLoop]: Abstraction has 6861 states and 7702 transitions. [2018-10-24 16:31:47,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:31:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 7702 transitions. [2018-10-24 16:31:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-10-24 16:31:47,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:47,077 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-10-24 16:31:47,077 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:47,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:47,078 INFO L82 PathProgramCache]: Analyzing trace with hash -168330838, now seen corresponding path program 1 times [2018-10-24 16:31:47,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:47,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:47,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 1085 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2018-10-24 16:31:47,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:47,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:31:47,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:31:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:31:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:31:47,623 INFO L87 Difference]: Start difference. First operand 6861 states and 7702 transitions. Second operand 3 states. [2018-10-24 16:31:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:49,510 INFO L93 Difference]: Finished difference Result 15331 states and 17252 transitions. [2018-10-24 16:31:49,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:31:49,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 698 [2018-10-24 16:31:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:49,528 INFO L225 Difference]: With dead ends: 15331 [2018-10-24 16:31:49,528 INFO L226 Difference]: Without dead ends: 8651 [2018-10-24 16:31:49,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:31:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2018-10-24 16:31:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 8651. [2018-10-24 16:31:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2018-10-24 16:31:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 9639 transitions. [2018-10-24 16:31:49,644 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 9639 transitions. Word has length 698 [2018-10-24 16:31:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:49,645 INFO L481 AbstractCegarLoop]: Abstraction has 8651 states and 9639 transitions. [2018-10-24 16:31:49,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:31:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 9639 transitions. [2018-10-24 16:31:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2018-10-24 16:31:49,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:49,658 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 16:31:49,658 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:49,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1703911156, now seen corresponding path program 1 times [2018-10-24 16:31:49,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:49,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:49,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:49,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:49,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 1434 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-10-24 16:31:50,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:50,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:31:50,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:31:50,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:31:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:31:50,833 INFO L87 Difference]: Start difference. First operand 8651 states and 9639 transitions. Second operand 4 states. [2018-10-24 16:31:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:52,426 INFO L93 Difference]: Finished difference Result 18911 states and 21251 transitions. [2018-10-24 16:31:52,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:31:52,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 854 [2018-10-24 16:31:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:52,453 INFO L225 Difference]: With dead ends: 18911 [2018-10-24 16:31:52,454 INFO L226 Difference]: Without dead ends: 10441 [2018-10-24 16:31:52,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:31:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2018-10-24 16:31:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 10441. [2018-10-24 16:31:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10441 states. [2018-10-24 16:31:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 11454 transitions. [2018-10-24 16:31:52,592 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 11454 transitions. Word has length 854 [2018-10-24 16:31:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:52,592 INFO L481 AbstractCegarLoop]: Abstraction has 10441 states and 11454 transitions. [2018-10-24 16:31:52,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:31:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 11454 transitions. [2018-10-24 16:31:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2018-10-24 16:31:52,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:52,608 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:31:52,608 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:52,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 443681825, now seen corresponding path program 1 times [2018-10-24 16:31:52,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:52,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:52,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:53,232 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 16:31:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 1595 proven. 201 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-10-24 16:31:54,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:31:54,505 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 16:31:54,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:54,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:31:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 1502 proven. 93 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-10-24 16:31:55,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:31:55,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2018-10-24 16:31:55,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:31:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:31:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:31:55,715 INFO L87 Difference]: Start difference. First operand 10441 states and 11454 transitions. Second operand 9 states. [2018-10-24 16:31:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:31:58,046 INFO L93 Difference]: Finished difference Result 21361 states and 23454 transitions. [2018-10-24 16:31:58,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 16:31:58,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 872 [2018-10-24 16:31:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:31:58,068 INFO L225 Difference]: With dead ends: 21361 [2018-10-24 16:31:58,068 INFO L226 Difference]: Without dead ends: 11101 [2018-10-24 16:31:58,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:31:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2018-10-24 16:31:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10977. [2018-10-24 16:31:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10977 states. [2018-10-24 16:31:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10977 states to 10977 states and 11933 transitions. [2018-10-24 16:31:58,297 INFO L78 Accepts]: Start accepts. Automaton has 10977 states and 11933 transitions. Word has length 872 [2018-10-24 16:31:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:31:58,298 INFO L481 AbstractCegarLoop]: Abstraction has 10977 states and 11933 transitions. [2018-10-24 16:31:58,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:31:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 10977 states and 11933 transitions. [2018-10-24 16:31:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2018-10-24 16:31:58,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:31:58,313 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:31:58,313 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:31:58,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:31:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash -604288664, now seen corresponding path program 1 times [2018-10-24 16:31:58,314 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:31:58,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:31:58,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:58,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:31:58,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:31:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:31:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2829 backedges. 1511 proven. 0 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2018-10-24 16:31:59,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:31:59,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:31:59,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:31:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:31:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:31:59,474 INFO L87 Difference]: Start difference. First operand 10977 states and 11933 transitions. Second operand 5 states. [2018-10-24 16:32:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:01,153 INFO L93 Difference]: Finished difference Result 23575 states and 25590 transitions. [2018-10-24 16:32:01,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:32:01,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 950 [2018-10-24 16:32:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:01,173 INFO L225 Difference]: With dead ends: 23575 [2018-10-24 16:32:01,173 INFO L226 Difference]: Without dead ends: 12779 [2018-10-24 16:32:01,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:32:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2018-10-24 16:32:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 11156. [2018-10-24 16:32:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11156 states. [2018-10-24 16:32:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 12116 transitions. [2018-10-24 16:32:01,328 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 12116 transitions. Word has length 950 [2018-10-24 16:32:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:01,329 INFO L481 AbstractCegarLoop]: Abstraction has 11156 states and 12116 transitions. [2018-10-24 16:32:01,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:32:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 12116 transitions. [2018-10-24 16:32:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1491 [2018-10-24 16:32:01,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:01,359 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:01,360 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:01,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1411178400, now seen corresponding path program 1 times [2018-10-24 16:32:01,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:01,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:01,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:01,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:01,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:02,691 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 16:32:02,926 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:32:03,124 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:32:03,446 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-24 16:32:03,712 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:32:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 4482 proven. 363 refuted. 0 times theorem prover too weak. 2133 trivial. 0 not checked. [2018-10-24 16:32:06,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:06,489 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 16:32:06,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:06,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:32:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 2320 proven. 0 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2018-10-24 16:32:08,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:32:08,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-24 16:32:08,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:32:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:32:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:32:08,227 INFO L87 Difference]: Start difference. First operand 11156 states and 12116 transitions. Second operand 11 states. [2018-10-24 16:32:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:13,452 INFO L93 Difference]: Finished difference Result 22442 states and 24372 transitions. [2018-10-24 16:32:13,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 16:32:13,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1490 [2018-10-24 16:32:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:13,469 INFO L225 Difference]: With dead ends: 22442 [2018-10-24 16:32:13,470 INFO L226 Difference]: Without dead ends: 11467 [2018-10-24 16:32:13,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1519 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2018-10-24 16:32:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2018-10-24 16:32:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 11335. [2018-10-24 16:32:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11335 states. [2018-10-24 16:32:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11335 states to 11335 states and 12069 transitions. [2018-10-24 16:32:13,641 INFO L78 Accepts]: Start accepts. Automaton has 11335 states and 12069 transitions. Word has length 1490 [2018-10-24 16:32:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:13,643 INFO L481 AbstractCegarLoop]: Abstraction has 11335 states and 12069 transitions. [2018-10-24 16:32:13,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:32:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 11335 states and 12069 transitions. [2018-10-24 16:32:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1599 [2018-10-24 16:32:13,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:13,681 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 6, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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 16:32:13,681 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:13,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1797355890, now seen corresponding path program 1 times [2018-10-24 16:32:13,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:13,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:13,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:13,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:13,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:14,908 WARN L179 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:32:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8217 backedges. 1460 proven. 0 refuted. 0 times theorem prover too weak. 6757 trivial. 0 not checked. [2018-10-24 16:32:16,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:16,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:16,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:16,160 INFO L87 Difference]: Start difference. First operand 11335 states and 12069 transitions. Second operand 4 states. [2018-10-24 16:32:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:17,413 INFO L93 Difference]: Finished difference Result 22489 states and 23956 transitions. [2018-10-24 16:32:17,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:17,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1598 [2018-10-24 16:32:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:17,426 INFO L225 Difference]: With dead ends: 22489 [2018-10-24 16:32:17,427 INFO L226 Difference]: Without dead ends: 11335 [2018-10-24 16:32:17,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2018-10-24 16:32:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 11335. [2018-10-24 16:32:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11335 states. [2018-10-24 16:32:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11335 states to 11335 states and 11847 transitions. [2018-10-24 16:32:17,568 INFO L78 Accepts]: Start accepts. Automaton has 11335 states and 11847 transitions. Word has length 1598 [2018-10-24 16:32:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:17,570 INFO L481 AbstractCegarLoop]: Abstraction has 11335 states and 11847 transitions. [2018-10-24 16:32:17,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11335 states and 11847 transitions. [2018-10-24 16:32:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1666 [2018-10-24 16:32:17,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:17,603 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:17,603 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:17,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -80413954, now seen corresponding path program 1 times [2018-10-24 16:32:17,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:17,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:17,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:17,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:17,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8455 backedges. 2786 proven. 0 refuted. 0 times theorem prover too weak. 5669 trivial. 0 not checked. [2018-10-24 16:32:19,655 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:19,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:19,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:19,657 INFO L87 Difference]: Start difference. First operand 11335 states and 11847 transitions. Second operand 4 states. [2018-10-24 16:32:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:20,837 INFO L93 Difference]: Finished difference Result 21765 states and 22753 transitions. [2018-10-24 16:32:20,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:20,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1665 [2018-10-24 16:32:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:20,842 INFO L225 Difference]: With dead ends: 21765 [2018-10-24 16:32:20,842 INFO L226 Difference]: Without dead ends: 5025 [2018-10-24 16:32:20,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:32:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2018-10-24 16:32:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 5025. [2018-10-24 16:32:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5025 states. [2018-10-24 16:32:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 5144 transitions. [2018-10-24 16:32:20,911 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 5144 transitions. Word has length 1665 [2018-10-24 16:32:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:20,912 INFO L481 AbstractCegarLoop]: Abstraction has 5025 states and 5144 transitions. [2018-10-24 16:32:20,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 5144 transitions. [2018-10-24 16:32:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1684 [2018-10-24 16:32:20,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:20,937 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:20,938 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:20,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:20,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1592832604, now seen corresponding path program 1 times [2018-10-24 16:32:20,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:20,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:20,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:20,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:20,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8561 backedges. 2628 proven. 0 refuted. 0 times theorem prover too weak. 5933 trivial. 0 not checked. [2018-10-24 16:32:23,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:23,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:32:23,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:32:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:32:23,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:32:23,608 INFO L87 Difference]: Start difference. First operand 5025 states and 5144 transitions. Second operand 7 states. [2018-10-24 16:32:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:25,034 INFO L93 Difference]: Finished difference Result 9771 states and 10009 transitions. [2018-10-24 16:32:25,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:32:25,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1683 [2018-10-24 16:32:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:25,040 INFO L225 Difference]: With dead ends: 9771 [2018-10-24 16:32:25,040 INFO L226 Difference]: Without dead ends: 4485 [2018-10-24 16:32:25,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:32:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2018-10-24 16:32:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 4485. [2018-10-24 16:32:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4485 states. [2018-10-24 16:32:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 4578 transitions. [2018-10-24 16:32:25,108 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 4578 transitions. Word has length 1683 [2018-10-24 16:32:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:25,109 INFO L481 AbstractCegarLoop]: Abstraction has 4485 states and 4578 transitions. [2018-10-24 16:32:25,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:32:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 4578 transitions. [2018-10-24 16:32:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2018-10-24 16:32:25,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:25,144 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:25,145 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:25,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1400328748, now seen corresponding path program 1 times [2018-10-24 16:32:25,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:25,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:25,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:26,141 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:32:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9594 backedges. 2780 proven. 0 refuted. 0 times theorem prover too weak. 6814 trivial. 0 not checked. [2018-10-24 16:32:27,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:27,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:32:27,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:27,750 INFO L87 Difference]: Start difference. First operand 4485 states and 4578 transitions. Second operand 4 states. [2018-10-24 16:32:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:28,666 INFO L93 Difference]: Finished difference Result 8789 states and 8981 transitions. [2018-10-24 16:32:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:28,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1719 [2018-10-24 16:32:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:28,670 INFO L225 Difference]: With dead ends: 8789 [2018-10-24 16:32:28,670 INFO L226 Difference]: Without dead ends: 4484 [2018-10-24 16:32:28,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 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 16:32:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2018-10-24 16:32:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4484. [2018-10-24 16:32:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4484 states. [2018-10-24 16:32:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 4570 transitions. [2018-10-24 16:32:28,725 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 4570 transitions. Word has length 1719 [2018-10-24 16:32:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:28,726 INFO L481 AbstractCegarLoop]: Abstraction has 4484 states and 4570 transitions. [2018-10-24 16:32:28,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 4570 transitions. [2018-10-24 16:32:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1738 [2018-10-24 16:32:28,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:28,753 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:28,753 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:28,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -112448186, now seen corresponding path program 1 times [2018-10-24 16:32:28,754 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:28,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:28,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:28,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:28,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 4753 proven. 360 refuted. 0 times theorem prover too weak. 4621 trivial. 0 not checked. [2018-10-24 16:32:30,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:30,809 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 16:32:30,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:31,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:32:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 2735 proven. 157 refuted. 0 times theorem prover too weak. 6842 trivial. 0 not checked. [2018-10-24 16:32:37,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:32:37,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2018-10-24 16:32:37,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:32:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:32:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:32:37,591 INFO L87 Difference]: Start difference. First operand 4484 states and 4570 transitions. Second operand 10 states. [2018-10-24 16:32:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:50,156 INFO L93 Difference]: Finished difference Result 10933 states and 11181 transitions. [2018-10-24 16:32:50,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 16:32:50,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1737 [2018-10-24 16:32:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:50,163 INFO L225 Difference]: With dead ends: 10933 [2018-10-24 16:32:50,164 INFO L226 Difference]: Without dead ends: 5914 [2018-10-24 16:32:50,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1758 GetRequests, 1741 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:32:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5914 states. [2018-10-24 16:32:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5914 to 4661. [2018-10-24 16:32:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4661 states. [2018-10-24 16:32:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 4727 transitions. [2018-10-24 16:32:50,228 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 4727 transitions. Word has length 1737 [2018-10-24 16:32:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:50,229 INFO L481 AbstractCegarLoop]: Abstraction has 4661 states and 4727 transitions. [2018-10-24 16:32:50,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:32:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 4727 transitions. [2018-10-24 16:32:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1909 [2018-10-24 16:32:50,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:50,253 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 2, 2, 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 16:32:50,254 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:50,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash 401359015, now seen corresponding path program 1 times [2018-10-24 16:32:50,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:50,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:50,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:50,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:50,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 3091 proven. 0 refuted. 0 times theorem prover too weak. 8373 trivial. 0 not checked. [2018-10-24 16:32:53,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:53,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:32:53,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:32:53,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:32:53,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:32:53,354 INFO L87 Difference]: Start difference. First operand 4661 states and 4727 transitions. Second operand 7 states. [2018-10-24 16:32:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:55,089 INFO L93 Difference]: Finished difference Result 8275 states and 8398 transitions. [2018-10-24 16:32:55,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:32:55,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1908 [2018-10-24 16:32:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:55,093 INFO L225 Difference]: With dead ends: 8275 [2018-10-24 16:32:55,093 INFO L226 Difference]: Without dead ends: 4300 [2018-10-24 16:32:55,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:32:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2018-10-24 16:32:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4300. [2018-10-24 16:32:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4300 states. [2018-10-24 16:32:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4300 states to 4300 states and 4350 transitions. [2018-10-24 16:32:55,136 INFO L78 Accepts]: Start accepts. Automaton has 4300 states and 4350 transitions. Word has length 1908 [2018-10-24 16:32:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:55,137 INFO L481 AbstractCegarLoop]: Abstraction has 4300 states and 4350 transitions. [2018-10-24 16:32:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:32:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4300 states and 4350 transitions. [2018-10-24 16:32:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2042 [2018-10-24 16:32:55,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:55,166 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 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 16:32:55,166 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:55,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1240948803, now seen corresponding path program 1 times [2018-10-24 16:32:55,167 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:55,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:55,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:55,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:55,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13169 backedges. 3283 proven. 120 refuted. 0 times theorem prover too weak. 9766 trivial. 0 not checked. [2018-10-24 16:32:57,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:57,740 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 16:32:57,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:58,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13169 backedges. 3329 proven. 74 refuted. 0 times theorem prover too weak. 9766 trivial. 0 not checked. [2018-10-24 16:33:01,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:33:01,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-24 16:33:01,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:33:01,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:33:01,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:33:01,688 INFO L87 Difference]: Start difference. First operand 4300 states and 4350 transitions. Second operand 7 states. [2018-10-24 16:33:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:04,377 INFO L93 Difference]: Finished difference Result 7880 states and 7979 transitions. [2018-10-24 16:33:04,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:33:04,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2041 [2018-10-24 16:33:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:04,379 INFO L225 Difference]: With dead ends: 7880 [2018-10-24 16:33:04,379 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 16:33:04,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2049 GetRequests, 2041 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:33:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 16:33:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 16:33:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 16:33:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 16:33:04,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2041 [2018-10-24 16:33:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:04,383 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 16:33:04,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:33:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 16:33:04,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 16:33:04,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 16:33:04,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,721 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,819 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,866 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,927 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:04,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,006 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,020 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,034 WARN L179 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 345 [2018-10-24 16:33:05,084 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,109 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,387 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,422 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,455 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,470 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,526 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,541 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 16:33:05,562 WARN L179 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 345 [2018-10-24 16:34:56,297 WARN L179 SmtUtils]: Spent 1.85 m on a formula simplification. DAG size of input: 291 DAG size of output: 116 Received shutdown request... [2018-10-24 16:35:07,329 WARN L187 SmtUtils]: Removed 24 from assertion stack [2018-10-24 16:35:07,329 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-24 16:35:07,330 INFO L168 Benchmark]: Toolchain (without parser) took 242331.10 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,331 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:35:07,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 781.25 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,332 INFO L168 Benchmark]: Boogie Procedure Inliner took 277.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.6 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,332 INFO L168 Benchmark]: Boogie Preprocessor took 119.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,333 INFO L168 Benchmark]: RCFGBuilder took 3506.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 121.7 MB). Peak memory consumption was 121.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,333 INFO L168 Benchmark]: TraceAbstraction took 237637.37 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -729.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 16:35:07,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 781.25 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 277.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.6 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3506.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 121.7 MB). Peak memory consumption was 121.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237637.37 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -729.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 118]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 291. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown