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/loop-new/gauss_sum_true-unreach-call.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:41:34,179 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:41:34,181 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:41:34,197 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:41:34,197 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:41:34,198 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:41:34,199 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:41:34,201 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:41:34,205 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:41:34,206 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:41:34,207 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:41:34,207 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:41:34,208 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:41:34,213 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:41:34,215 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:41:34,215 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:41:34,222 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:41:34,225 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:41:34,227 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:41:34,229 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:41:34,232 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:41:34,234 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:41:34,239 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:41:34,254 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 [2018-10-23 09:41:34,285 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:41:34,285 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:41:34,288 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:41:34,288 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:41:34,291 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:41:34,291 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:41:34,291 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:41:34,292 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:41:34,292 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:41:34,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:41:34,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:41:34,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:41:34,294 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:41:34,295 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:41:34,295 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:41:34,295 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:41:34,295 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:41:34,296 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:41:34,297 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:41:34,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:41:34,297 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:41:34,297 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:41:34,297 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:41:34,298 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:41:34,298 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:41:34,298 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:41:34,298 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:41:34,299 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:41:34,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:41:34,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:41:34,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:41:34,381 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:41:34,381 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:41:34,382 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-10-23 09:41:34,453 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/896d3fe87/ed84960b34c44114a9dd0fa178415742/FLAG707348654 [2018-10-23 09:41:34,912 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:41:34,913 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-10-23 09:41:34,920 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/896d3fe87/ed84960b34c44114a9dd0fa178415742/FLAG707348654 [2018-10-23 09:41:34,936 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/896d3fe87/ed84960b34c44114a9dd0fa178415742 [2018-10-23 09:41:34,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:41:34,947 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:41:34,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:41:34,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:41:34,952 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:41:34,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:34" (1/1) ... [2018-10-23 09:41:34,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b49186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:34, skipping insertion in model container [2018-10-23 09:41:34,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:34" (1/1) ... [2018-10-23 09:41:34,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:41:34,992 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:41:35,190 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:41:35,194 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:41:35,217 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:41:35,231 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:41:35,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35 WrapperNode [2018-10-23 09:41:35,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:41:35,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:41:35,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:41:35,233 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:41:35,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:41:35,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:41:35,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:41:35,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:41:35,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (1/1) ... [2018-10-23 09:41:35,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:41:35,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:41:35,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:41:35,285 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:41:35,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (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 [2018-10-23 09:41:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:41:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:41:35,698 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:41:35,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:35 BoogieIcfgContainer [2018-10-23 09:41:35,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:41:35,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:41:35,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:41:35,715 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:41:35,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:41:34" (1/3) ... [2018-10-23 09:41:35,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eec3082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:35, skipping insertion in model container [2018-10-23 09:41:35,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:35" (2/3) ... [2018-10-23 09:41:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eec3082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:35, skipping insertion in model container [2018-10-23 09:41:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:35" (3/3) ... [2018-10-23 09:41:35,723 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-10-23 09:41:35,737 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:41:35,747 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:41:35,768 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:41:35,808 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:41:35,809 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:41:35,810 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:41:35,810 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:41:35,810 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:41:35,810 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:41:35,810 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:41:35,811 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:41:35,811 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:41:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-23 09:41:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-23 09:41:35,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:35,835 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:35,837 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:35,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1390787819, now seen corresponding path program 1 times [2018-10-23 09:41:35,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:35,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:35,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:35,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:35,953 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:35,953 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:35,953 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:35,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:35,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:36,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:41:36,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-23 09:41:36,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 09:41:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 09:41:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:41:36,430 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 9 states. [2018-10-23 09:41:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:36,970 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2018-10-23 09:41:36,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:41:36,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2018-10-23 09:41:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:36,983 INFO L225 Difference]: With dead ends: 41 [2018-10-23 09:41:36,983 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 09:41:36,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:41:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 09:41:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 09:41:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 09:41:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 09:41:37,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-23 09:41:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:37,024 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 09:41:37,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 09:41:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 09:41:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 09:41:37,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:37,026 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:37,026 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:37,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:37,027 INFO L82 PathProgramCache]: Analyzing trace with hash -164811888, now seen corresponding path program 1 times [2018-10-23 09:41:37,027 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:37,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:37,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:37,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:37,043 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:37,043 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:37,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:37,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:37,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:37,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-23 09:41:37,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 09:41:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 09:41:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:41:37,445 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-10-23 09:41:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:37,881 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-23 09:41:37,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 09:41:37,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-10-23 09:41:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:37,883 INFO L225 Difference]: With dead ends: 18 [2018-10-23 09:41:37,883 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 09:41:37,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:41:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 09:41:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-23 09:41:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-23 09:41:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-23 09:41:37,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-23 09:41:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:37,889 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-23 09:41:37,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 09:41:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-23 09:41:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-23 09:41:37,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:37,890 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:37,890 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:37,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash -814263691, now seen corresponding path program 2 times [2018-10-23 09:41:37,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:37,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:37,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:37,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,904 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:37,904 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:37,904 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:37,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:37,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:37,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:37,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:38,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:38,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-23 09:41:38,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:41:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:41:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:41:38,237 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-10-23 09:41:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:38,385 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-23 09:41:38,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 09:41:38,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-23 09:41:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:38,387 INFO L225 Difference]: With dead ends: 19 [2018-10-23 09:41:38,387 INFO L226 Difference]: Without dead ends: 16 [2018-10-23 09:41:38,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:41:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-23 09:41:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-23 09:41:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-23 09:41:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-23 09:41:38,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-23 09:41:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:38,392 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-23 09:41:38,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:41:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-23 09:41:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 09:41:38,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:38,393 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:38,394 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:38,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 527566896, now seen corresponding path program 3 times [2018-10-23 09:41:38,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:38,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:38,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:38,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:38,406 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:38,406 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:38,407 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:38,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:38,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-23 09:41:38,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:38,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:38,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:38,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-23 09:41:38,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 09:41:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 09:41:38,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:41:38,731 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2018-10-23 09:41:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:38,904 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-23 09:41:38,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 09:41:38,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-10-23 09:41:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:38,906 INFO L225 Difference]: With dead ends: 20 [2018-10-23 09:41:38,906 INFO L226 Difference]: Without dead ends: 17 [2018-10-23 09:41:38,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:41:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-23 09:41:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-23 09:41:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 09:41:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 09:41:38,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-23 09:41:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:38,911 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 09:41:38,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 09:41:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 09:41:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 09:41:38,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:38,912 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:38,912 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:38,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -825357867, now seen corresponding path program 4 times [2018-10-23 09:41:38,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:38,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:38,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:38,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:38,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:38,928 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:38,928 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:38,928 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:38,941 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:39,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:39,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:39,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:39,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:39,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-23 09:41:39,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:41:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:41:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:41:39,269 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-10-23 09:41:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:39,463 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-23 09:41:39,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 09:41:39,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-10-23 09:41:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:39,464 INFO L225 Difference]: With dead ends: 21 [2018-10-23 09:41:39,464 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 09:41:39,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:41:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 09:41:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-23 09:41:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 09:41:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-23 09:41:39,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-23 09:41:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:39,469 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-23 09:41:39,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:41:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-23 09:41:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-23 09:41:39,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:39,470 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:39,470 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:39,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash 183647440, now seen corresponding path program 5 times [2018-10-23 09:41:39,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:39,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:39,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:39,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,484 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:39,484 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:39,485 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:39,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:39,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-23 09:41:39,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:39,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:39,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:39,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-23 09:41:39,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 09:41:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 09:41:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:41:39,771 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2018-10-23 09:41:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:39,940 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 09:41:39,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 09:41:39,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-10-23 09:41:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:39,942 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:41:39,942 INFO L226 Difference]: Without dead ends: 19 [2018-10-23 09:41:39,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:41:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-23 09:41:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-23 09:41:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-23 09:41:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-23 09:41:39,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-23 09:41:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:39,947 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-23 09:41:39,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 09:41:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-23 09:41:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 09:41:39,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:39,948 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:39,949 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:39,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1398040885, now seen corresponding path program 6 times [2018-10-23 09:41:39,949 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:39,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:39,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:39,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,962 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:39,963 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:39,963 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:39,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:40,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-23 09:41:40,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:40,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:40,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:40,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-23 09:41:40,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 09:41:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 09:41:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:41:40,327 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-10-23 09:41:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:40,548 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-23 09:41:40,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 09:41:40,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-10-23 09:41:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:40,550 INFO L225 Difference]: With dead ends: 23 [2018-10-23 09:41:40,550 INFO L226 Difference]: Without dead ends: 20 [2018-10-23 09:41:40,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:41:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-23 09:41:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-23 09:41:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 09:41:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 09:41:40,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-23 09:41:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:40,555 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 09:41:40,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 09:41:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 09:41:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 09:41:40,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:40,556 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:40,557 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:40,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:40,557 INFO L82 PathProgramCache]: Analyzing trace with hash 389532016, now seen corresponding path program 7 times [2018-10-23 09:41:40,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:40,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:40,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:40,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:40,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:40,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:40,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:40,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:40,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:40,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:41,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:41,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-23 09:41:41,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 09:41:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 09:41:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:41:41,089 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2018-10-23 09:41:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:41,620 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-23 09:41:41,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:41:41,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2018-10-23 09:41:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:41,621 INFO L225 Difference]: With dead ends: 24 [2018-10-23 09:41:41,622 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:41:41,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:41:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:41:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-23 09:41:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-23 09:41:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-23 09:41:41,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-23 09:41:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:41,628 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-23 09:41:41,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 09:41:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-23 09:41:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 09:41:41,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:41,629 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:41,629 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:41,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -809471851, now seen corresponding path program 8 times [2018-10-23 09:41:41,630 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:41,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:41,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:41,646 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:41,646 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:41,646 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:41,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:41,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:41,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:41,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:42,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:42,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-23 09:41:42,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:41:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:41:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:41:42,130 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2018-10-23 09:41:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:42,498 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 09:41:42,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 09:41:42,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-10-23 09:41:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:42,500 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:41:42,500 INFO L226 Difference]: Without dead ends: 22 [2018-10-23 09:41:42,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:41:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-23 09:41:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-23 09:41:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 09:41:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-23 09:41:42,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-23 09:41:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:42,504 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-23 09:41:42,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:41:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-23 09:41:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 09:41:42,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:42,505 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:42,506 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:42,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash 676113936, now seen corresponding path program 9 times [2018-10-23 09:41:42,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:42,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:42,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:42,518 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:42,518 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:42,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:42,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:42,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-23 09:41:42,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:42,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:42,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:42,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-23 09:41:42,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 09:41:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 09:41:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:41:42,885 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2018-10-23 09:41:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:43,134 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-23 09:41:43,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:41:43,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-10-23 09:41:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:43,136 INFO L225 Difference]: With dead ends: 26 [2018-10-23 09:41:43,137 INFO L226 Difference]: Without dead ends: 23 [2018-10-23 09:41:43,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:41:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-23 09:41:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-23 09:41:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 09:41:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 09:41:43,142 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-23 09:41:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:43,142 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 09:41:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 09:41:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 09:41:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 09:41:43,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:43,143 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:43,144 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:43,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash -515366923, now seen corresponding path program 10 times [2018-10-23 09:41:43,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:43,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:43,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:43,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:43,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:43,157 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:43,157 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:43,157 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:43,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:43,369 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:43,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:43,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:45,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:45,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-23 09:41:45,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:41:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:41:45,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:41:45,181 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2018-10-23 09:41:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:45,597 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-23 09:41:45,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:41:45,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2018-10-23 09:41:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:45,599 INFO L225 Difference]: With dead ends: 27 [2018-10-23 09:41:45,599 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 09:41:45,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:41:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 09:41:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-23 09:41:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-23 09:41:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-23 09:41:45,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-23 09:41:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:45,604 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-23 09:41:45,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:41:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-23 09:41:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:41:45,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:45,605 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:45,605 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:45,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1203432112, now seen corresponding path program 11 times [2018-10-23 09:41:45,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:45,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:45,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:45,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:45,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:45,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:45,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:45,618 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:45,631 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:45,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-23 09:41:45,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:45,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:46,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:46,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-23 09:41:46,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 09:41:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 09:41:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:41:46,120 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2018-10-23 09:41:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:46,541 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 09:41:46,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 09:41:46,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-10-23 09:41:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:46,542 INFO L225 Difference]: With dead ends: 28 [2018-10-23 09:41:46,542 INFO L226 Difference]: Without dead ends: 25 [2018-10-23 09:41:46,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:41:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-23 09:41:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-23 09:41:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 09:41:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-23 09:41:46,546 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-23 09:41:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:46,546 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-23 09:41:46,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 09:41:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-23 09:41:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 09:41:46,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:46,547 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:46,548 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:46,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1348372651, now seen corresponding path program 12 times [2018-10-23 09:41:46,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:46,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:46,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:46,561 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:46,561 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:46,561 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:46,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:46,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 09:41:46,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:46,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:47,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:47,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-23 09:41:47,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:41:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:41:47,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:41:47,209 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2018-10-23 09:41:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:47,565 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-23 09:41:47,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:41:47,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2018-10-23 09:41:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:47,568 INFO L225 Difference]: With dead ends: 29 [2018-10-23 09:41:47,568 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 09:41:47,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:41:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 09:41:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-23 09:41:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 09:41:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 09:41:47,574 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-23 09:41:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:47,574 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 09:41:47,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:41:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 09:41:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:41:47,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:47,576 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:47,576 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:47,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1150058320, now seen corresponding path program 13 times [2018-10-23 09:41:47,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:47,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:47,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:47,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:47,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:47,589 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:47,589 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:47,590 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:47,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:47,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:48,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:48,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-23 09:41:48,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:41:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:41:48,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:41:48,036 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-10-23 09:41:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:48,443 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-23 09:41:48,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:41:48,443 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-10-23 09:41:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:48,444 INFO L225 Difference]: With dead ends: 30 [2018-10-23 09:41:48,444 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 09:41:48,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:41:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 09:41:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-23 09:41:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 09:41:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-23 09:41:48,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-23 09:41:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:48,449 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-23 09:41:48,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:41:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-23 09:41:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 09:41:48,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:48,450 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:48,450 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:48,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:48,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1292007093, now seen corresponding path program 14 times [2018-10-23 09:41:48,450 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:48,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:48,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:48,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:48,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:48,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:48,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:48,460 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:48,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:48,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:48,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:48,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:48,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:48,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-23 09:41:48,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 09:41:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 09:41:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:41:48,880 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2018-10-23 09:41:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:49,358 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 09:41:49,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 09:41:49,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-10-23 09:41:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:49,363 INFO L225 Difference]: With dead ends: 31 [2018-10-23 09:41:49,363 INFO L226 Difference]: Without dead ends: 28 [2018-10-23 09:41:49,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:41:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-23 09:41:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-23 09:41:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-23 09:41:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-23 09:41:49,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-23 09:41:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:49,368 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-23 09:41:49,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 09:41:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-23 09:41:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-23 09:41:49,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:49,369 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:49,369 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:49,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1397451760, now seen corresponding path program 15 times [2018-10-23 09:41:49,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:49,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:49,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:49,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:49,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:49,379 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:49,379 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:49,380 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:49,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:49,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-23 09:41:49,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:49,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:49,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:49,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-23 09:41:49,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 09:41:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 09:41:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:41:49,863 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2018-10-23 09:41:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:50,602 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-23 09:41:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 09:41:50,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-10-23 09:41:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:50,603 INFO L225 Difference]: With dead ends: 32 [2018-10-23 09:41:50,603 INFO L226 Difference]: Without dead ends: 29 [2018-10-23 09:41:50,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:41:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-23 09:41:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-23 09:41:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 09:41:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 09:41:50,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-23 09:41:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:50,609 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 09:41:50,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 09:41:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 09:41:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 09:41:50,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:50,610 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:50,610 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:50,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 371269141, now seen corresponding path program 16 times [2018-10-23 09:41:50,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:50,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:50,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:50,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:50,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:50,620 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:50,621 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:50,621 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:50,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:50,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:50,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:50,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:51,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:51,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-23 09:41:51,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:41:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:41:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:41:51,455 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2018-10-23 09:41:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:52,129 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-23 09:41:52,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 09:41:52,130 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2018-10-23 09:41:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:52,131 INFO L225 Difference]: With dead ends: 33 [2018-10-23 09:41:52,131 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 09:41:52,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:41:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 09:41:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-23 09:41:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-23 09:41:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-23 09:41:52,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-23 09:41:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:52,138 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-23 09:41:52,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:41:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-23 09:41:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 09:41:52,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:52,139 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:52,139 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:52,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1375620976, now seen corresponding path program 17 times [2018-10-23 09:41:52,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:52,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:52,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:52,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,149 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:52,150 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:52,150 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:52,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:52,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-23 09:41:52,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:52,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:52,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:52,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-23 09:41:52,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 09:41:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 09:41:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:41:52,646 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2018-10-23 09:41:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:53,156 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 09:41:53,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:41:53,157 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2018-10-23 09:41:53,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:53,157 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:41:53,158 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 09:41:53,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:41:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 09:41:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-23 09:41:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 09:41:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-23 09:41:53,164 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-23 09:41:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:53,164 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-23 09:41:53,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 09:41:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-23 09:41:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-23 09:41:53,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:53,165 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:53,165 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:53,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash 305360245, now seen corresponding path program 18 times [2018-10-23 09:41:53,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:53,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:53,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:53,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,174 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:53,174 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:53,174 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:53,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:53,266 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-23 09:41:53,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:53,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:53,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:53,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-23 09:41:53,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:41:53,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:41:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:41:53,988 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2018-10-23 09:41:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:54,645 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-23 09:41:54,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:41:54,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2018-10-23 09:41:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:54,645 INFO L225 Difference]: With dead ends: 35 [2018-10-23 09:41:54,646 INFO L226 Difference]: Without dead ends: 32 [2018-10-23 09:41:54,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:41:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-23 09:41:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-23 09:41:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 09:41:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 09:41:54,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-23 09:41:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:54,650 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 09:41:54,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:41:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 09:41:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:41:54,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:54,651 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:54,651 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:54,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash 876170544, now seen corresponding path program 19 times [2018-10-23 09:41:54,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:54,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:54,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,660 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:54,661 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:54,661 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:54,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:54,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:55,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:55,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-23 09:41:55,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:41:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:41:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:41:55,158 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2018-10-23 09:41:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:55,676 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-23 09:41:55,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:41:55,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2018-10-23 09:41:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:55,677 INFO L225 Difference]: With dead ends: 36 [2018-10-23 09:41:55,678 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 09:41:55,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:41:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 09:41:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-23 09:41:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-23 09:41:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-23 09:41:55,684 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-23 09:41:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:55,684 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-23 09:41:55,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:41:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-23 09:41:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-23 09:41:55,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:55,685 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:55,685 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:55,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1391420629, now seen corresponding path program 20 times [2018-10-23 09:41:55,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:55,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:55,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:55,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:55,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:55,694 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:55,694 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:55,694 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:55,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:55,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:55,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:55,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:56,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:56,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-23 09:41:56,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 09:41:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 09:41:56,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:41:56,506 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2018-10-23 09:41:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:57,066 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 09:41:57,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 09:41:57,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2018-10-23 09:41:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:57,067 INFO L225 Difference]: With dead ends: 37 [2018-10-23 09:41:57,067 INFO L226 Difference]: Without dead ends: 34 [2018-10-23 09:41:57,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:41:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-23 09:41:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-23 09:41:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-23 09:41:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-23 09:41:57,073 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-23 09:41:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:57,073 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-23 09:41:57,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 09:41:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-23 09:41:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 09:41:57,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:57,074 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:57,074 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:57,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 184304080, now seen corresponding path program 21 times [2018-10-23 09:41:57,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:57,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:57,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:57,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,083 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:57,083 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:57,084 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:57,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:57,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-23 09:41:57,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:57,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:57,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:57,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-23 09:41:57,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-23 09:41:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-23 09:41:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:41:57,768 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2018-10-23 09:41:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:58,398 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-23 09:41:58,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 09:41:58,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2018-10-23 09:41:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:58,402 INFO L225 Difference]: With dead ends: 38 [2018-10-23 09:41:58,402 INFO L226 Difference]: Without dead ends: 35 [2018-10-23 09:41:58,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:41:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-23 09:41:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-23 09:41:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 09:41:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 09:41:58,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-23 09:41:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:58,409 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 09:41:58,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-23 09:41:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 09:41:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 09:41:58,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:58,410 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:58,410 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:58,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:58,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1418396725, now seen corresponding path program 22 times [2018-10-23 09:41:58,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:58,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:58,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:58,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:58,419 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:58,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:58,420 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:41:58,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:58,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:58,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:58,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:59,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:59,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-23 09:41:59,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:41:59,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:41:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:41:59,458 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2018-10-23 09:42:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:00,097 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-23 09:42:00,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 09:42:00,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2018-10-23 09:42:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:00,098 INFO L225 Difference]: With dead ends: 39 [2018-10-23 09:42:00,098 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 09:42:00,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:42:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 09:42:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-23 09:42:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-23 09:42:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-23 09:42:00,103 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-23 09:42:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:00,104 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-23 09:42:00,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:42:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-23 09:42:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-23 09:42:00,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:00,105 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:00,105 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:00,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1020563056, now seen corresponding path program 23 times [2018-10-23 09:42:00,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:00,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:00,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:00,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:00,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:00,112 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:00,113 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:00,113 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:00,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:00,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-23 09:42:00,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:00,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:00,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:00,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-23 09:42:00,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:42:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:42:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:42:00,863 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2018-10-23 09:42:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:01,719 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 09:42:01,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:42:01,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2018-10-23 09:42:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:01,720 INFO L225 Difference]: With dead ends: 40 [2018-10-23 09:42:01,720 INFO L226 Difference]: Without dead ends: 37 [2018-10-23 09:42:01,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:42:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-23 09:42:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-23 09:42:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-23 09:42:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-23 09:42:01,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-23 09:42:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:01,726 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-23 09:42:01,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:42:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-23 09:42:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-23 09:42:01,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:01,727 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:01,727 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:01,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1572621205, now seen corresponding path program 24 times [2018-10-23 09:42:01,727 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:01,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:01,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:01,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,735 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:01,735 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:01,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:01,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:01,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 09:42:01,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:01,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:02,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:02,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-23 09:42:02,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-23 09:42:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-23 09:42:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:42:02,423 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2018-10-23 09:42:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:03,148 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-23 09:42:03,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-23 09:42:03,148 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2018-10-23 09:42:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:03,149 INFO L225 Difference]: With dead ends: 41 [2018-10-23 09:42:03,149 INFO L226 Difference]: Without dead ends: 38 [2018-10-23 09:42:03,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:42:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-23 09:42:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-23 09:42:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 09:42:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 09:42:03,155 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-23 09:42:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:03,155 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 09:42:03,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-23 09:42:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 09:42:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 09:42:03,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:03,156 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:03,156 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:03,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1506554640, now seen corresponding path program 25 times [2018-10-23 09:42:03,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:03,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:03,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:03,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:03,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:03,164 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:03,164 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:03,164 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-23 09:42:03,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:03,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:03,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:03,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-23 09:42:03,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 09:42:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 09:42:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:42:03,878 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2018-10-23 09:42:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:04,654 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-23 09:42:04,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:42:04,655 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2018-10-23 09:42:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:04,656 INFO L225 Difference]: With dead ends: 42 [2018-10-23 09:42:04,656 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:42:04,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:42:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:42:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-23 09:42:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-23 09:42:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-23 09:42:04,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-23 09:42:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:04,662 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-23 09:42:04,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 09:42:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-23 09:42:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 09:42:04,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:04,665 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:04,665 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:04,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash -541508875, now seen corresponding path program 26 times [2018-10-23 09:42:04,666 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:04,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:04,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:04,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:04,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:04,673 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:04,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:04,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:04,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:04,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:05,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:05,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-23 09:42:05,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-23 09:42:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-23 09:42:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:42:05,602 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2018-10-23 09:42:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:06,662 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 09:42:06,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-23 09:42:06,663 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2018-10-23 09:42:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:06,663 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:42:06,663 INFO L226 Difference]: Without dead ends: 40 [2018-10-23 09:42:06,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:42:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-23 09:42:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-23 09:42:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-23 09:42:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-23 09:42:06,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-23 09:42:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:06,669 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-23 09:42:06,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-23 09:42:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-23 09:42:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-23 09:42:06,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:06,670 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:06,670 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:06,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 393031600, now seen corresponding path program 27 times [2018-10-23 09:42:06,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:06,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:06,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:06,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:06,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:06,676 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:06,676 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:06,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-23 09:42:06,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:07,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-23 09:42:07,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:07,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:07,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:07,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-23 09:42:07,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-23 09:42:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-23 09:42:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:42:07,729 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2018-10-23 09:42:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:08,631 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-23 09:42:08,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 09:42:08,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2018-10-23 09:42:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:08,632 INFO L225 Difference]: With dead ends: 44 [2018-10-23 09:42:08,632 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 09:42:08,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:42:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 09:42:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-23 09:42:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 09:42:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 09:42:08,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-23 09:42:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:08,638 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 09:42:08,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-23 09:42:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 09:42:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 09:42:08,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:08,638 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:08,639 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:08,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash -700984747, now seen corresponding path program 28 times [2018-10-23 09:42:08,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:08,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:08,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:08,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:08,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:08,647 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:08,647 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:08,647 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:08,669 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:09,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:09,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:09,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:10,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:10,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-23 09:42:10,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:42:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:42:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:42:10,287 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2018-10-23 09:42:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:11,155 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-23 09:42:11,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:42:11,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2018-10-23 09:42:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:11,156 INFO L225 Difference]: With dead ends: 45 [2018-10-23 09:42:11,157 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 09:42:11,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:42:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 09:42:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-23 09:42:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-23 09:42:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-23 09:42:11,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-23 09:42:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:11,163 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-23 09:42:11,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:42:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-23 09:42:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-23 09:42:11,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:11,164 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:11,164 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:11,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash -255753136, now seen corresponding path program 29 times [2018-10-23 09:42:11,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:11,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:11,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:11,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:11,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:11,171 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:11,171 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:11,171 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:11,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:11,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-23 09:42:11,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:11,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:12,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:12,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-23 09:42:12,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-23 09:42:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-23 09:42:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:42:12,236 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2018-10-23 09:42:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:13,203 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 09:42:13,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-23 09:42:13,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2018-10-23 09:42:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:13,204 INFO L225 Difference]: With dead ends: 46 [2018-10-23 09:42:13,204 INFO L226 Difference]: Without dead ends: 43 [2018-10-23 09:42:13,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:42:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-23 09:42:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-23 09:42:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-23 09:42:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-23 09:42:13,210 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-23 09:42:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:13,211 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-23 09:42:13,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-23 09:42:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-23 09:42:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-23 09:42:13,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:13,211 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:13,212 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:13,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash 661524917, now seen corresponding path program 30 times [2018-10-23 09:42:13,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:13,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:13,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:13,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,219 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:13,219 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:13,219 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:13,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:13,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-23 09:42:13,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:13,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:14,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:14,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-23 09:42:14,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-23 09:42:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-23 09:42:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:42:14,375 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2018-10-23 09:42:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:15,326 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-23 09:42:15,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-23 09:42:15,327 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2018-10-23 09:42:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:15,327 INFO L225 Difference]: With dead ends: 47 [2018-10-23 09:42:15,327 INFO L226 Difference]: Without dead ends: 44 [2018-10-23 09:42:15,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:42:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-23 09:42:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-23 09:42:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 09:42:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 09:42:15,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-23 09:42:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:15,334 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 09:42:15,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-23 09:42:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 09:42:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:42:15,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:15,334 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:15,335 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:15,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -967626512, now seen corresponding path program 31 times [2018-10-23 09:42:15,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:15,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:15,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:15,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:15,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:15,342 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:15,342 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:15,342 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:15,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:15,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:16,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:16,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-23 09:42:16,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:42:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:42:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:42:16,250 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2018-10-23 09:42:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:17,398 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-23 09:42:17,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:42:17,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2018-10-23 09:42:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:17,399 INFO L225 Difference]: With dead ends: 48 [2018-10-23 09:42:17,399 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 09:42:17,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:42:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 09:42:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-23 09:42:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-23 09:42:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-23 09:42:17,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-23 09:42:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:17,405 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-23 09:42:17,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:42:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-23 09:42:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-23 09:42:17,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:17,405 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:17,406 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:17,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash 68286741, now seen corresponding path program 32 times [2018-10-23 09:42:17,406 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:17,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,413 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:17,413 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:17,413 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:17,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:17,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:17,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:17,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:19,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:19,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-23 09:42:19,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-23 09:42:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-23 09:42:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:42:19,622 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2018-10-23 09:42:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:20,681 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 09:42:20,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-23 09:42:20,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2018-10-23 09:42:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:20,682 INFO L225 Difference]: With dead ends: 49 [2018-10-23 09:42:20,682 INFO L226 Difference]: Without dead ends: 46 [2018-10-23 09:42:20,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:42:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-23 09:42:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-23 09:42:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-23 09:42:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-23 09:42:20,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-23 09:42:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:20,688 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-23 09:42:20,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-23 09:42:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-23 09:42:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-23 09:42:20,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:20,689 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:20,690 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:20,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2116826512, now seen corresponding path program 33 times [2018-10-23 09:42:20,690 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:20,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:20,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:20,697 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:20,697 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:20,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:20,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:21,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-23 09:42:21,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:21,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:22,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:22,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-23 09:42:22,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-23 09:42:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-23 09:42:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:42:22,773 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2018-10-23 09:42:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:23,881 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-23 09:42:23,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-23 09:42:23,881 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2018-10-23 09:42:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:23,882 INFO L225 Difference]: With dead ends: 50 [2018-10-23 09:42:23,882 INFO L226 Difference]: Without dead ends: 47 [2018-10-23 09:42:23,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:42:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-23 09:42:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-23 09:42:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 09:42:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 09:42:23,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-23 09:42:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:23,888 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 09:42:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-23 09:42:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 09:42:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 09:42:23,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:23,888 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:23,889 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:23,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1197049973, now seen corresponding path program 34 times [2018-10-23 09:42:23,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:23,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:23,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:23,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:23,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:23,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:23,896 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:23,896 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:23,910 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:24,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:24,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:24,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:25,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:25,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-23 09:42:25,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:42:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:42:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:42:25,331 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2018-10-23 09:42:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:26,492 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-23 09:42:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:42:26,493 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2018-10-23 09:42:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:26,494 INFO L225 Difference]: With dead ends: 51 [2018-10-23 09:42:26,494 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:42:26,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:42:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:42:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-23 09:42:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 09:42:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-23 09:42:26,500 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-23 09:42:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:26,500 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-23 09:42:26,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:42:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-23 09:42:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 09:42:26,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:26,501 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:26,501 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:26,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1546218960, now seen corresponding path program 35 times [2018-10-23 09:42:26,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:26,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:26,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:26,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:26,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:26,509 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:26,509 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:26,509 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:26,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:26,634 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-23 09:42:26,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:26,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:28,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:28,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-23 09:42:28,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-23 09:42:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-23 09:42:28,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:42:28,102 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2018-10-23 09:42:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:29,387 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 09:42:29,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-23 09:42:29,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2018-10-23 09:42:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:29,388 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:42:29,388 INFO L226 Difference]: Without dead ends: 49 [2018-10-23 09:42:29,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:42:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-23 09:42:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-23 09:42:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-23 09:42:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-23 09:42:29,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-23 09:42:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:29,393 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-23 09:42:29,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-23 09:42:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-23 09:42:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-23 09:42:29,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:29,394 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:29,395 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:29,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash -688209963, now seen corresponding path program 36 times [2018-10-23 09:42:29,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:29,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:29,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:29,416 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:29,416 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:29,416 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:29,429 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:29,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-23 09:42:29,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:30,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:30,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-23 09:42:30,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-23 09:42:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-23 09:42:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:42:30,921 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2018-10-23 09:42:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:32,402 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-23 09:42:32,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-23 09:42:32,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2018-10-23 09:42:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:32,403 INFO L225 Difference]: With dead ends: 53 [2018-10-23 09:42:32,403 INFO L226 Difference]: Without dead ends: 50 [2018-10-23 09:42:32,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:42:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-23 09:42:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-23 09:42:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 09:42:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 09:42:32,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-23 09:42:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:32,409 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 09:42:32,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-23 09:42:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 09:42:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 09:42:32,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:32,410 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:32,410 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:32,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash 140265168, now seen corresponding path program 37 times [2018-10-23 09:42:32,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:32,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:32,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:32,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:32,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:32,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:32,421 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:32,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:32,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:32,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:33,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:33,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-23 09:42:33,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:42:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:42:33,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:42:33,535 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2018-10-23 09:42:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:34,861 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-23 09:42:34,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:42:34,862 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2018-10-23 09:42:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:34,863 INFO L225 Difference]: With dead ends: 54 [2018-10-23 09:42:34,863 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 09:42:34,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:42:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 09:42:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-23 09:42:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-23 09:42:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-23 09:42:34,867 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-23 09:42:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:34,868 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-23 09:42:34,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:42:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-23 09:42:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-23 09:42:34,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:34,868 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:34,869 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:34,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash 53190453, now seen corresponding path program 38 times [2018-10-23 09:42:34,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:34,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:34,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:34,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:34,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:34,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:34,877 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:34,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:34,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:34,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:34,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:34,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:36,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:36,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-23 09:42:36,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-23 09:42:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-23 09:42:36,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:42:36,087 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2018-10-23 09:42:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:37,676 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 09:42:37,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-23 09:42:37,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2018-10-23 09:42:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:37,677 INFO L225 Difference]: With dead ends: 55 [2018-10-23 09:42:37,677 INFO L226 Difference]: Without dead ends: 52 [2018-10-23 09:42:37,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 09:42:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-23 09:42:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-23 09:42:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-23 09:42:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-23 09:42:37,682 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-23 09:42:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:37,682 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-23 09:42:37,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-23 09:42:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-23 09:42:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-23 09:42:37,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:37,683 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:37,683 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:37,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1648841584, now seen corresponding path program 39 times [2018-10-23 09:42:37,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:37,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:37,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:37,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:37,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:37,692 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:37,692 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:37,692 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:37,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:39,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-23 09:42:39,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:39,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:40,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:40,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-23 09:42:40,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-23 09:42:40,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-23 09:42:40,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 09:42:40,465 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2018-10-23 09:42:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:41,949 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-23 09:42:41,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-23 09:42:41,949 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2018-10-23 09:42:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:41,950 INFO L225 Difference]: With dead ends: 56 [2018-10-23 09:42:41,950 INFO L226 Difference]: Without dead ends: 53 [2018-10-23 09:42:41,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:42:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-23 09:42:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-23 09:42:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 09:42:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 09:42:41,955 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-23 09:42:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:41,955 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 09:42:41,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-23 09:42:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 09:42:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 09:42:41,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:41,956 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:41,956 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:41,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash -425580907, now seen corresponding path program 40 times [2018-10-23 09:42:41,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:41,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,965 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:41,965 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:41,965 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:41,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:42,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:42,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:42,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:43,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:43,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-23 09:42:43,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:42:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:42:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:42:43,710 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2018-10-23 09:42:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:45,216 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-23 09:42:45,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 09:42:45,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2018-10-23 09:42:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:45,217 INFO L225 Difference]: With dead ends: 57 [2018-10-23 09:42:45,217 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 09:42:45,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:42:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 09:42:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-23 09:42:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-23 09:42:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-23 09:42:45,222 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-23 09:42:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:45,223 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-23 09:42:45,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:42:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-23 09:42:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 09:42:45,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:45,223 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:45,223 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:45,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash -308168688, now seen corresponding path program 41 times [2018-10-23 09:42:45,224 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:45,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:45,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:45,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:45,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:45,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:45,233 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:45,233 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:45,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:45,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-23 09:42:45,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:45,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:46,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:46,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-23 09:42:46,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 09:42:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 09:42:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:42:46,676 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2018-10-23 09:42:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:48,441 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 09:42:48,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 09:42:48,441 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2018-10-23 09:42:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:48,442 INFO L225 Difference]: With dead ends: 58 [2018-10-23 09:42:48,442 INFO L226 Difference]: Without dead ends: 55 [2018-10-23 09:42:48,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:42:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-23 09:42:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-23 09:42:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-23 09:42:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-23 09:42:48,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-23 09:42:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:48,447 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-23 09:42:48,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 09:42:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-23 09:42:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-23 09:42:48,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:48,448 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:48,448 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:48,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -963357195, now seen corresponding path program 42 times [2018-10-23 09:42:48,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:48,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:48,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:48,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:48,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:48,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:48,457 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:48,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:49,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-23 09:42:49,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:49,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:50,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:50,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-23 09:42:50,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-23 09:42:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-23 09:42:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:42:50,736 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2018-10-23 09:42:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:52,534 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-23 09:42:52,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-23 09:42:52,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2018-10-23 09:42:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:52,535 INFO L225 Difference]: With dead ends: 59 [2018-10-23 09:42:52,536 INFO L226 Difference]: Without dead ends: 56 [2018-10-23 09:42:52,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:42:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-23 09:42:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-23 09:42:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 09:42:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 09:42:52,540 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-23 09:42:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:52,541 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 09:42:52,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-23 09:42:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 09:42:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 09:42:52,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:52,541 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:52,542 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:52,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 200635568, now seen corresponding path program 43 times [2018-10-23 09:42:52,542 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:52,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:52,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:52,550 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:52,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:52,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:52,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:52,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:53,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:53,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-23 09:42:53,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:42:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:42:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:42:53,915 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2018-10-23 09:42:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:55,614 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-23 09:42:55,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:42:55,614 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2018-10-23 09:42:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:55,615 INFO L225 Difference]: With dead ends: 60 [2018-10-23 09:42:55,615 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 09:42:55,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:42:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 09:42:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-23 09:42:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-23 09:42:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-23 09:42:55,619 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-23 09:42:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:55,619 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-23 09:42:55,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:42:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-23 09:42:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-23 09:42:55,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:55,620 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:55,620 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:55,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1924672853, now seen corresponding path program 44 times [2018-10-23 09:42:55,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:55,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:55,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:55,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:55,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:55,628 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:55,628 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:55,628 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:55,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:55,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:55,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:55,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:57,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:57,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-23 09:42:57,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-23 09:42:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-23 09:42:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:42:57,293 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2018-10-23 09:42:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:59,242 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 09:42:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-23 09:42:59,242 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2018-10-23 09:42:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:59,243 INFO L225 Difference]: With dead ends: 61 [2018-10-23 09:42:59,243 INFO L226 Difference]: Without dead ends: 58 [2018-10-23 09:42:59,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:42:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-23 09:42:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-23 09:42:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-23 09:42:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-23 09:42:59,249 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-23 09:42:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:59,250 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-23 09:42:59,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-23 09:42:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-23 09:42:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-23 09:42:59,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:59,250 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:59,251 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:59,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -464746160, now seen corresponding path program 45 times [2018-10-23 09:42:59,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:59,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:59,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:59,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,258 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:59,259 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:59,259 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:59,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:03,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-23 09:43:03,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:03,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:05,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:05,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-23 09:43:05,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-23 09:43:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-23 09:43:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:43:05,039 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2018-10-23 09:43:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:06,870 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-23 09:43:06,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-23 09:43:06,870 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2018-10-23 09:43:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:06,871 INFO L225 Difference]: With dead ends: 62 [2018-10-23 09:43:06,871 INFO L226 Difference]: Without dead ends: 59 [2018-10-23 09:43:06,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:43:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-23 09:43:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-23 09:43:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 09:43:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 09:43:06,876 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-23 09:43:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:06,876 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 09:43:06,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-23 09:43:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 09:43:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 09:43:06,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:06,877 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:06,877 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:06,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1522291531, now seen corresponding path program 46 times [2018-10-23 09:43:06,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:06,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:06,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:06,885 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:06,885 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:06,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:06,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:07,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:07,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:07,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:09,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:09,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-23 09:43:09,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-23 09:43:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-23 09:43:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:43:09,179 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2018-10-23 09:43:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:11,138 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-23 09:43:11,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-23 09:43:11,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2018-10-23 09:43:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:11,139 INFO L225 Difference]: With dead ends: 63 [2018-10-23 09:43:11,139 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 09:43:11,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:43:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 09:43:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-23 09:43:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-23 09:43:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-23 09:43:11,144 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-23 09:43:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:11,144 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-23 09:43:11,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-23 09:43:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-23 09:43:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-23 09:43:11,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:11,145 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:11,145 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:11,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 53540336, now seen corresponding path program 47 times [2018-10-23 09:43:11,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:11,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,152 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:11,152 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:11,152 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:11,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:11,315 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-23 09:43:11,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:11,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:12,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:12,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-23 09:43:12,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-23 09:43:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-23 09:43:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:43:12,890 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2018-10-23 09:43:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:14,975 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 09:43:14,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-23 09:43:14,976 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2018-10-23 09:43:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:14,976 INFO L225 Difference]: With dead ends: 64 [2018-10-23 09:43:14,977 INFO L226 Difference]: Without dead ends: 61 [2018-10-23 09:43:14,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:43:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-23 09:43:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-23 09:43:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-23 09:43:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-23 09:43:14,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-23 09:43:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:14,982 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-23 09:43:14,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-23 09:43:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-23 09:43:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-23 09:43:14,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:14,982 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:14,983 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:14,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1659687957, now seen corresponding path program 48 times [2018-10-23 09:43:14,983 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:14,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:14,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:14,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:14,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:14,990 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:14,990 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:14,990 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:15,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:43:16,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-23 09:43:16,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:16,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:18,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:18,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-23 09:43:18,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-23 09:43:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-23 09:43:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:43:18,325 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states. [2018-10-23 09:43:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:20,529 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-23 09:43:20,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-23 09:43:20,530 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 60 [2018-10-23 09:43:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:20,531 INFO L225 Difference]: With dead ends: 65 [2018-10-23 09:43:20,531 INFO L226 Difference]: Without dead ends: 62 [2018-10-23 09:43:20,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:43:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-23 09:43:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-23 09:43:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-23 09:43:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-23 09:43:20,537 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-23 09:43:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:20,537 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-23 09:43:20,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-23 09:43:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-23 09:43:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 09:43:20,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:20,538 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:20,539 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:20,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash -89343344, now seen corresponding path program 49 times [2018-10-23 09:43:20,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:20,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:20,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:20,547 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:20,547 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:20,547 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:20,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:20,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:22,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:22,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-23 09:43:22,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-23 09:43:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-23 09:43:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:43:22,316 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 58 states. [2018-10-23 09:43:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:24,711 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-23 09:43:24,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-23 09:43:24,711 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 61 [2018-10-23 09:43:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:24,712 INFO L225 Difference]: With dead ends: 66 [2018-10-23 09:43:24,712 INFO L226 Difference]: Without dead ends: 63 [2018-10-23 09:43:24,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:43:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-23 09:43:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-23 09:43:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-23 09:43:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-23 09:43:24,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-23 09:43:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:24,717 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-23 09:43:24,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-23 09:43:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-23 09:43:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-23 09:43:24,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:24,717 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:24,717 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:24,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1525261173, now seen corresponding path program 50 times [2018-10-23 09:43:24,718 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:24,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:24,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:24,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:24,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:24,726 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:24,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:24,727 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:24,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:24,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:24,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:24,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:26,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:26,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-23 09:43:26,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-23 09:43:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-23 09:43:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:43:26,633 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 59 states. [2018-10-23 09:43:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:29,111 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-23 09:43:29,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-23 09:43:29,112 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 62 [2018-10-23 09:43:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:29,113 INFO L225 Difference]: With dead ends: 67 [2018-10-23 09:43:29,113 INFO L226 Difference]: Without dead ends: 64 [2018-10-23 09:43:29,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:43:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-23 09:43:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-23 09:43:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-23 09:43:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-23 09:43:29,118 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-23 09:43:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:29,118 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-23 09:43:29,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-23 09:43:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-23 09:43:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-23 09:43:29,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:29,119 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:29,119 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:29,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 38393648, now seen corresponding path program 51 times [2018-10-23 09:43:29,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:29,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:29,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:29,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:29,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:29,128 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:29,129 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:29,129 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:29,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:37,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-23 09:43:37,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:37,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:39,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:39,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-23 09:43:39,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-23 09:43:39,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-23 09:43:39,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:43:39,066 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 60 states. [2018-10-23 09:43:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:41,342 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-23 09:43:41,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-23 09:43:41,343 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2018-10-23 09:43:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:41,343 INFO L225 Difference]: With dead ends: 68 [2018-10-23 09:43:41,344 INFO L226 Difference]: Without dead ends: 65 [2018-10-23 09:43:41,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:43:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-23 09:43:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-23 09:43:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 09:43:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-23 09:43:41,349 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-23 09:43:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:41,350 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-23 09:43:41,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-23 09:43:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-23 09:43:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 09:43:41,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:41,350 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:41,350 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:41,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1190140629, now seen corresponding path program 52 times [2018-10-23 09:43:41,351 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:41,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:41,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:41,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:41,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:41,358 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:41,359 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:41,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:41,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:42,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:42,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:42,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:44,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:44,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-23 09:43:44,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-23 09:43:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-23 09:43:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:43:44,217 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 61 states. [2018-10-23 09:43:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:46,546 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-23 09:43:46,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-23 09:43:46,546 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 64 [2018-10-23 09:43:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:46,547 INFO L225 Difference]: With dead ends: 69 [2018-10-23 09:43:46,547 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 09:43:46,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:43:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 09:43:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-23 09:43:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-23 09:43:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-23 09:43:46,553 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-23 09:43:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:46,553 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-23 09:43:46,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-23 09:43:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-23 09:43:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-23 09:43:46,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:46,553 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:46,554 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:46,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1760408624, now seen corresponding path program 53 times [2018-10-23 09:43:46,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:46,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:46,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:46,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:46,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:46,562 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:46,562 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:46,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:46,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:46,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-23 09:43:46,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:46,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:48,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:48,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-23 09:43:48,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-23 09:43:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-23 09:43:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:43:48,525 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 62 states. [2018-10-23 09:43:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:51,172 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-23 09:43:51,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-23 09:43:51,172 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2018-10-23 09:43:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:51,173 INFO L225 Difference]: With dead ends: 70 [2018-10-23 09:43:51,173 INFO L226 Difference]: Without dead ends: 67 [2018-10-23 09:43:51,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:43:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-23 09:43:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-23 09:43:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-23 09:43:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-23 09:43:51,178 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-23 09:43:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:51,179 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-23 09:43:51,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-23 09:43:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-23 09:43:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-23 09:43:51,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:51,179 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:51,180 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:51,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1261845045, now seen corresponding path program 54 times [2018-10-23 09:43:51,180 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:51,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:51,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:51,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:51,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:51,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:51,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:51,191 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:51,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:43:53,717 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-23 09:43:53,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:53,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:56,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:56,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-23 09:43:56,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-23 09:43:56,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-23 09:43:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:43:56,635 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 63 states. [2018-10-23 09:43:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:59,503 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-23 09:43:59,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-23 09:43:59,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 66 [2018-10-23 09:43:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:59,504 INFO L225 Difference]: With dead ends: 71 [2018-10-23 09:43:59,504 INFO L226 Difference]: Without dead ends: 68 [2018-10-23 09:43:59,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:43:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-23 09:43:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-23 09:43:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 09:43:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-23 09:43:59,509 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-23 09:43:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:59,509 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-23 09:43:59,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-23 09:43:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-23 09:43:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 09:43:59,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:59,510 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:59,510 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:59,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 462428272, now seen corresponding path program 55 times [2018-10-23 09:43:59,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:59,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:59,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:59,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:59,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:59,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:59,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:59,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:01,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:01,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-23 09:44:01,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-23 09:44:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-23 09:44:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:44:01,734 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 64 states. [2018-10-23 09:44:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:04,651 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-23 09:44:04,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-23 09:44:04,656 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2018-10-23 09:44:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:04,657 INFO L225 Difference]: With dead ends: 72 [2018-10-23 09:44:04,657 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 09:44:04,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:44:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 09:44:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-23 09:44:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-23 09:44:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-23 09:44:04,662 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-23 09:44:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:04,662 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-23 09:44:04,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-23 09:44:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-23 09:44:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-23 09:44:04,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:04,663 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:04,663 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:04,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1450312085, now seen corresponding path program 56 times [2018-10-23 09:44:04,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:04,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:04,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:04,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:04,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:04,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:04,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:04,670 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:04,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:44:04,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:44:04,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:04,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:06,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:06,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-23 09:44:06,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-23 09:44:06,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-23 09:44:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:44:06,775 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 65 states. [2018-10-23 09:44:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:09,764 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-23 09:44:09,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-23 09:44:09,764 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 68 [2018-10-23 09:44:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:09,765 INFO L225 Difference]: With dead ends: 73 [2018-10-23 09:44:09,765 INFO L226 Difference]: Without dead ends: 70 [2018-10-23 09:44:09,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:44:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-23 09:44:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-23 09:44:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-23 09:44:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-23 09:44:09,771 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-23 09:44:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:09,771 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-23 09:44:09,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-23 09:44:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-23 09:44:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-23 09:44:09,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:09,772 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:09,772 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:09,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2009939216, now seen corresponding path program 57 times [2018-10-23 09:44:09,772 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:09,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:09,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:09,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:09,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:09,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:09,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:09,780 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:09,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:44:17,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-23 09:44:17,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:17,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:20,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:20,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-23 09:44:20,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-23 09:44:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-23 09:44:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:44:20,024 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 66 states. [2018-10-23 09:44:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:22,906 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-23 09:44:22,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-23 09:44:22,907 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 69 [2018-10-23 09:44:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:22,908 INFO L225 Difference]: With dead ends: 74 [2018-10-23 09:44:22,908 INFO L226 Difference]: Without dead ends: 71 [2018-10-23 09:44:22,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:44:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-23 09:44:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-23 09:44:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-23 09:44:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-23 09:44:22,913 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-23 09:44:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:22,913 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-23 09:44:22,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-23 09:44:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-23 09:44:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 09:44:22,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:22,914 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:22,914 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:22,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2116456203, now seen corresponding path program 58 times [2018-10-23 09:44:22,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:22,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:22,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:22,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:22,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:22,923 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:22,923 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:22,923 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:22,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:44:23,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:44:23,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:23,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:26,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:26,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-23 09:44:26,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-23 09:44:26,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-23 09:44:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:44:26,141 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 67 states. [2018-10-23 09:44:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:29,028 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-23 09:44:29,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-23 09:44:29,029 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 70 [2018-10-23 09:44:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:29,029 INFO L225 Difference]: With dead ends: 75 [2018-10-23 09:44:29,030 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 09:44:29,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:44:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 09:44:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-23 09:44:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-23 09:44:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-23 09:44:29,036 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-23 09:44:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:29,036 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-23 09:44:29,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-23 09:44:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-23 09:44:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-23 09:44:29,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:29,037 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:29,037 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:29,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:29,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1185695312, now seen corresponding path program 59 times [2018-10-23 09:44:29,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:29,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:29,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:29,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:29,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:29,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:29,045 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:29,045 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:29,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:44:29,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-23 09:44:29,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:29,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:31,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:31,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-23 09:44:31,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-23 09:44:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-23 09:44:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:44:31,787 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 68 states. [2018-10-23 09:44:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:34,815 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-23 09:44:34,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-23 09:44:34,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2018-10-23 09:44:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:34,817 INFO L225 Difference]: With dead ends: 76 [2018-10-23 09:44:34,817 INFO L226 Difference]: Without dead ends: 73 [2018-10-23 09:44:34,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-10-23 09:44:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-23 09:44:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-23 09:44:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-23 09:44:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-23 09:44:34,822 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-23 09:44:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:34,822 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-23 09:44:34,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-23 09:44:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-23 09:44:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-23 09:44:34,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:34,823 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:34,823 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:34,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1898088533, now seen corresponding path program 60 times [2018-10-23 09:44:34,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:34,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:34,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:34,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:34,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:34,831 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:34,832 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:34,832 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:34,841 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:44:37,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-23 09:44:37,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:37,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:40,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:40,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-23 09:44:40,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-23 09:44:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-23 09:44:40,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-23 09:44:40,247 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 69 states. [2018-10-23 09:44:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:43,231 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-23 09:44:43,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-23 09:44:43,234 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 72 [2018-10-23 09:44:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:43,235 INFO L225 Difference]: With dead ends: 77 [2018-10-23 09:44:43,235 INFO L226 Difference]: Without dead ends: 74 [2018-10-23 09:44:43,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:44:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-23 09:44:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-23 09:44:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 09:44:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-23 09:44:43,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-23 09:44:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:43,241 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-23 09:44:43,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-23 09:44:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-23 09:44:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 09:44:43,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:43,242 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:43,242 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:43,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1288860080, now seen corresponding path program 61 times [2018-10-23 09:44:43,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:43,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:43,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:43,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:43,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:43,252 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:43,252 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:43,252 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:43,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:43,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:47,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:47,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-23 09:44:47,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-23 09:44:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-23 09:44:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:44:47,440 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 70 states. [2018-10-23 09:44:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:50,651 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-23 09:44:50,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-23 09:44:50,651 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 73 [2018-10-23 09:44:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:50,653 INFO L225 Difference]: With dead ends: 78 [2018-10-23 09:44:50,653 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 09:44:50,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:44:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 09:44:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-23 09:44:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-23 09:44:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-23 09:44:50,659 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-23 09:44:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:50,659 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-23 09:44:50,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-23 09:44:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-23 09:44:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-23 09:44:50,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:50,660 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:50,660 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:50,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1300019275, now seen corresponding path program 62 times [2018-10-23 09:44:50,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:50,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:50,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:50,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:50,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:50,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:50,669 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:50,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:50,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:44:50,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:44:50,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:50,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:53,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:53,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-23 09:44:53,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-23 09:44:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-23 09:44:53,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:44:53,243 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 71 states. [2018-10-23 09:44:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:56,541 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-23 09:44:56,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-23 09:44:56,542 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 74 [2018-10-23 09:44:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:56,543 INFO L225 Difference]: With dead ends: 79 [2018-10-23 09:44:56,543 INFO L226 Difference]: Without dead ends: 76 [2018-10-23 09:44:56,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:44:56,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-23 09:44:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-23 09:44:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-23 09:44:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-23 09:44:56,550 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-23 09:44:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:56,550 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-23 09:44:56,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-23 09:44:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-23 09:44:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-23 09:44:56,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:56,551 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:56,551 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:56,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1645954320, now seen corresponding path program 63 times [2018-10-23 09:44:56,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:56,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:56,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:56,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:56,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:56,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:56,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:56,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:56,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:45:17,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-23 09:45:17,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:17,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:19,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:19,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-23 09:45:19,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-23 09:45:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-23 09:45:19,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:45:19,716 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 72 states. [2018-10-23 09:45:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:23,207 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-23 09:45:23,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-23 09:45:23,208 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 75 [2018-10-23 09:45:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:23,209 INFO L225 Difference]: With dead ends: 80 [2018-10-23 09:45:23,209 INFO L226 Difference]: Without dead ends: 77 [2018-10-23 09:45:23,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:45:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-23 09:45:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-23 09:45:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-23 09:45:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-23 09:45:23,216 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-23 09:45:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:23,216 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-23 09:45:23,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-23 09:45:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-23 09:45:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 09:45:23,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:23,217 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:23,217 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:23,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 514961173, now seen corresponding path program 64 times [2018-10-23 09:45:23,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:23,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:23,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:23,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:23,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:23,227 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:23,227 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:23,227 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:23,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:45:24,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:45:24,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:24,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:27,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:27,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-23 09:45:27,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-23 09:45:27,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-23 09:45:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:45:27,038 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 73 states. [2018-10-23 09:45:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:30,416 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-23 09:45:30,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-23 09:45:30,417 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 76 [2018-10-23 09:45:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:30,418 INFO L225 Difference]: With dead ends: 81 [2018-10-23 09:45:30,418 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 09:45:30,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:45:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 09:45:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-23 09:45:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-23 09:45:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-23 09:45:30,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-23 09:45:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:30,424 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-23 09:45:30,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-23 09:45:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-23 09:45:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-23 09:45:30,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:30,425 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:30,425 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:30,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1216135280, now seen corresponding path program 65 times [2018-10-23 09:45:30,426 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:30,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:30,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:30,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:30,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:30,433 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:30,433 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:30,433 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:30,448 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:45:30,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-23 09:45:30,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:30,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:33,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:33,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-23 09:45:33,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-23 09:45:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-23 09:45:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:45:33,467 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 74 states. [2018-10-23 09:45:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:36,888 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-23 09:45:36,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-23 09:45:36,889 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 77 [2018-10-23 09:45:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:36,889 INFO L225 Difference]: With dead ends: 82 [2018-10-23 09:45:36,890 INFO L226 Difference]: Without dead ends: 79 [2018-10-23 09:45:36,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-10-23 09:45:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-23 09:45:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-23 09:45:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-23 09:45:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-23 09:45:36,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-23 09:45:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:36,894 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-23 09:45:36,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-23 09:45:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-23 09:45:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-23 09:45:36,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:36,895 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:36,895 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:36,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash 954449525, now seen corresponding path program 66 times [2018-10-23 09:45:36,895 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:36,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:36,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:36,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:36,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:36,902 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:36,902 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:36,902 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:36,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:45:41,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-23 09:45:41,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:41,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:43,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:43,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-23 09:45:43,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-23 09:45:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-23 09:45:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-23 09:45:43,798 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 75 states. [2018-10-23 09:45:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:47,504 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-23 09:45:47,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-23 09:45:47,505 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 78 [2018-10-23 09:45:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:47,505 INFO L225 Difference]: With dead ends: 83 [2018-10-23 09:45:47,506 INFO L226 Difference]: Without dead ends: 80 [2018-10-23 09:45:47,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2018-10-23 09:45:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-23 09:45:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-23 09:45:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-23 09:45:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-23 09:45:47,510 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-23 09:45:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:47,511 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-23 09:45:47,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-23 09:45:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-23 09:45:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 09:45:47,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:47,511 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:47,511 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:47,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash -476898256, now seen corresponding path program 67 times [2018-10-23 09:45:47,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:47,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:47,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:47,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:47,518 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:47,518 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:47,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:47,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:45:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:45:47,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-23 09:45:49,201 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 09:45:49,402 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:49,402 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 09:45:49,407 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 09:45:49,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:45:49 BoogieIcfgContainer [2018-10-23 09:45:49,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:45:49,408 INFO L168 Benchmark]: Toolchain (without parser) took 254462.63 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 851.4 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -890.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:45:49,411 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:45:49,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.74 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 09:45:49,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.64 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. [2018-10-23 09:45:49,412 INFO L168 Benchmark]: Boogie Preprocessor took 17.02 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. [2018-10-23 09:45:49,412 INFO L168 Benchmark]: RCFGBuilder took 414.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-23 09:45:49,413 INFO L168 Benchmark]: TraceAbstraction took 253707.63 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 90.7 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -90.2 MB). Peak memory consumption was 539.2 kB. Max. memory is 7.1 GB. [2018-10-23 09:45:49,424 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.74 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.64 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. * Boogie Preprocessor took 17.02 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. * RCFGBuilder took 414.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253707.63 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 90.7 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -90.2 MB). Peak memory consumption was 539.2 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 64). Cancelled while BasicCegarLoop was analyzing trace of length 80 with TraceHistMax 67,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 46 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 253.6s OverallTime, 68 OverallIterations, 67 TraceHistogramMax, 98.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 416 SDtfs, 100 SDslu, 10673 SDs, 0 SdLazy, 137805 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3015 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 2749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 82.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 67 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 66.7s SatisfiabilityAnalysisTime, 81.8s InterpolantComputationTime, 3015 NumberOfCodeBlocks, 3015 NumberOfCodeBlocksAsserted, 672 NumberOfCheckSat, 2948 ConstructedInterpolants, 0 QuantifiedInterpolants, 1013998 SizeOfPredicates, 335 NumberOfNonLiveVariables, 14204 ConjunctsInSsa, 10925 ConjunctsInUnsatCore, 67 InterpolantComputations, 1 PerfectInterpolantSequences, 0/50116 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown