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.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:41:49,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:41:49,412 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:41:49,428 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:41:49,429 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:41:49,430 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:41:49,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:41:49,434 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:41:49,436 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:41:49,439 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:41:49,440 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:41:49,440 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:41:49,443 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:41:49,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:41:49,453 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:41:49,454 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:41:49,455 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:41:49,456 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:41:49,462 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:41:49,464 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:41:49,465 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:41:49,466 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:41:49,468 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 09:41:49,469 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 09:41:49,469 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 09:41:49,471 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 09:41:49,472 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 09:41:49,472 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 09:41:49,473 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 09:41:49,474 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 09:41:49,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 09:41:49,479 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 09:41:49,482 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 09:41:49,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:41:49,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:41:49,513 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:41:49,513 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:41:49,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:41:49,513 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:41:49,515 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:41:49,515 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:41:49,515 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:41:49,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:41:49,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:41:49,516 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:41:49,516 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:41:49,516 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:41:49,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:41:49,516 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:41:49,517 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:41:49,517 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:41:49,518 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:41:49,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:41:49,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:41:49,518 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:41:49,518 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:41:49,519 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:41:49,519 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:41:49,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:41:49,520 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:41:49,520 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:41:49,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:41:49,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:41:49,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:41:49,595 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:41:49,595 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:41:49,596 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-10-23 09:41:49,663 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8af23e96/d1c5503a3dc24ec5841379762c8aba8e/FLAGf27fa51d6 [2018-10-23 09:41:50,154 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:41:50,155 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-10-23 09:41:50,163 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8af23e96/d1c5503a3dc24ec5841379762c8aba8e/FLAGf27fa51d6 [2018-10-23 09:41:50,185 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8af23e96/d1c5503a3dc24ec5841379762c8aba8e [2018-10-23 09:41:50,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:41:50,198 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:41:50,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:41:50,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:41:50,203 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:41:50,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3502ec3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50, skipping insertion in model container [2018-10-23 09:41:50,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:41:50,247 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:41:50,424 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:41:50,428 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:41:50,446 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:41:50,467 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:41:50,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50 WrapperNode [2018-10-23 09:41:50,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:41:50,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:41:50,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:41:50,469 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:41:50,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:41:50,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:41:50,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:41:50,507 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:41:50,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (1/1) ... [2018-10-23 09:41:50,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:41:50,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:41:50,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:41:50,524 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:41:50,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (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 09:41:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:41:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:41:50,850 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:41:50,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:50 BoogieIcfgContainer [2018-10-23 09:41:50,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:41:50,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:41:50,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:41:50,855 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:41:50,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:41:50" (1/3) ... [2018-10-23 09:41:50,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48211125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:50, skipping insertion in model container [2018-10-23 09:41:50,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:50" (2/3) ... [2018-10-23 09:41:50,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48211125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:50, skipping insertion in model container [2018-10-23 09:41:50,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:50" (3/3) ... [2018-10-23 09:41:50,859 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-10-23 09:41:50,868 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:41:50,877 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:41:50,895 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:41:50,925 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:41:50,926 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:41:50,926 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:41:50,926 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:41:50,926 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:41:50,927 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:41:50,927 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:41:50,927 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:41:50,927 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:41:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2018-10-23 09:41:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 09:41:50,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:50,947 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:50,949 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:50,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2018-10-23 09:41:50,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:50,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:51,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:51,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,041 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:51,042 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:51,042 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:41:51,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:51,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:51,232 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 09:41:51,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:41:51,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 09:41:51,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 09:41:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 09:41:51,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:41:51,278 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2018-10-23 09:41:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:51,365 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-23 09:41:51,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 09:41:51,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-23 09:41:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:51,376 INFO L225 Difference]: With dead ends: 21 [2018-10-23 09:41:51,376 INFO L226 Difference]: Without dead ends: 9 [2018-10-23 09:41:51,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:41:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-23 09:41:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-23 09:41:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-23 09:41:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-23 09:41:51,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-23 09:41:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:51,415 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-23 09:41:51,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 09:41:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-23 09:41:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-23 09:41:51,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:51,416 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:51,416 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:51,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2018-10-23 09:41:51,417 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:51,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:51,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:51,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,427 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:51,427 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:51,427 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 09:41:51,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:51,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:51,654 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 09:41:51,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:51,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-23 09:41:51,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 09:41:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 09:41:51,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:41:51,686 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-10-23 09:41:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:51,891 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-23 09:41:51,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:41:51,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-10-23 09:41:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:51,892 INFO L225 Difference]: With dead ends: 13 [2018-10-23 09:41:51,892 INFO L226 Difference]: Without dead ends: 10 [2018-10-23 09:41:51,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:41:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-23 09:41:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-23 09:41:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-23 09:41:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-23 09:41:51,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-23 09:41:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:51,897 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-23 09:41:51,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 09:41:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-23 09:41:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-23 09:41:51,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:51,898 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:51,898 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:51,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2018-10-23 09:41:51,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:51,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:51,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:51,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:51,911 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:51,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:51,911 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 09:41:51,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:51,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:51,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:51,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:52,253 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 09:41:52,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:52,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-23 09:41:52,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 09:41:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 09:41:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:41:52,275 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-10-23 09:41:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:52,350 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-23 09:41:52,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:41:52,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-23 09:41:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:52,352 INFO L225 Difference]: With dead ends: 14 [2018-10-23 09:41:52,352 INFO L226 Difference]: Without dead ends: 11 [2018-10-23 09:41:52,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:41:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-23 09:41:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-23 09:41:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 09:41:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-23 09:41:52,356 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-23 09:41:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:52,356 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-23 09:41:52,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 09:41:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-23 09:41:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 09:41:52,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:52,357 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:52,358 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:52,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2018-10-23 09:41:52,358 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:52,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:52,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,368 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:52,368 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:52,369 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 09:41:52,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:52,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-23 09:41:52,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:52,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:52,597 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 09:41:52,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:52,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-23 09:41:52,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:41:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:41:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:41:52,621 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-10-23 09:41:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:52,719 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-23 09:41:52,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 09:41:52,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-23 09:41:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:52,720 INFO L225 Difference]: With dead ends: 15 [2018-10-23 09:41:52,721 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 09:41:52,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:41:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 09:41:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-23 09:41:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-23 09:41:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-23 09:41:52,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-23 09:41:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:52,725 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-23 09:41:52,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:41:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-23 09:41:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 09:41:52,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:52,726 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:52,726 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:52,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2018-10-23 09:41:52,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:52,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:52,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:52,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,736 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:52,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:52,737 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 09:41:52,744 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:52,789 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:52,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:52,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:53,107 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 09:41:53,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:53,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-23 09:41:53,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 09:41:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 09:41:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:41:53,144 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-10-23 09:41:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:53,287 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-23 09:41:53,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 09:41:53,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-10-23 09:41:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:53,289 INFO L225 Difference]: With dead ends: 16 [2018-10-23 09:41:53,289 INFO L226 Difference]: Without dead ends: 13 [2018-10-23 09:41:53,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:41:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-23 09:41:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-23 09:41:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-23 09:41:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-23 09:41:53,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-23 09:41:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:53,294 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-23 09:41:53,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 09:41:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-23 09:41:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-23 09:41:53,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:53,295 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:53,296 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:53,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2018-10-23 09:41:53,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:53,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:53,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:53,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,307 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:53,307 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:53,307 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 09:41:53,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:53,344 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-23 09:41:53,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:53,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:53,572 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 09:41:53,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:53,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-23 09:41:53,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 09:41:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 09:41:53,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:41:53,596 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-10-23 09:41:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:53,721 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-23 09:41:53,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:41:53,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2018-10-23 09:41:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:53,722 INFO L225 Difference]: With dead ends: 17 [2018-10-23 09:41:53,722 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 09:41:53,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:41:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 09:41:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 09:41:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 09:41:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 09:41:53,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-23 09:41:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:53,727 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 09:41:53,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 09:41:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 09:41:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 09:41:53,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:53,728 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:53,729 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:53,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2018-10-23 09:41:53,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:53,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:53,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:53,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:53,740 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:53,740 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:53,740 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:41:53,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:53,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-23 09:41:53,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:53,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:53,957 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 09:41:53,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:53,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-23 09:41:53,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 09:41:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 09:41:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:41:53,980 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-10-23 09:41:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:54,101 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-23 09:41:54,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 09:41:54,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-10-23 09:41:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:54,103 INFO L225 Difference]: With dead ends: 18 [2018-10-23 09:41:54,103 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 09:41:54,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:41:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 09:41:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-23 09:41:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-23 09:41:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-23 09:41:54,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-23 09:41:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:54,109 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-23 09:41:54,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 09:41:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-23 09:41:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-23 09:41:54,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:54,110 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:54,110 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:54,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2018-10-23 09:41:54,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:54,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:54,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:54,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:54,124 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:54,124 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 09:41:54,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:54,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:54,391 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 09:41:54,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:54,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-23 09:41:54,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:41:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:41:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:41:54,414 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-10-23 09:41:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:54,535 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-23 09:41:54,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 09:41:54,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-23 09:41:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:54,536 INFO L225 Difference]: With dead ends: 19 [2018-10-23 09:41:54,536 INFO L226 Difference]: Without dead ends: 16 [2018-10-23 09:41:54,537 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 09:41:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-23 09:41:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-23 09:41:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-23 09:41:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-23 09:41:54,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-23 09:41:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:54,541 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-23 09:41:54,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:41:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-23 09:41:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 09:41:54,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:54,542 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:54,542 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:54,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:54,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2018-10-23 09:41:54,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:54,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:54,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:54,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,554 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:54,555 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:54,555 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 09:41:54,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:54,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:54,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:54,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:54,753 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 09:41:54,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:54,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-23 09:41:54,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 09:41:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 09:41:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:41:54,775 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2018-10-23 09:41:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:54,928 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-23 09:41:54,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 09:41:54,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-10-23 09:41:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:54,929 INFO L225 Difference]: With dead ends: 20 [2018-10-23 09:41:54,930 INFO L226 Difference]: Without dead ends: 17 [2018-10-23 09:41:54,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:41:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-23 09:41:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-23 09:41:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 09:41:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 09:41:54,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-23 09:41:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:54,935 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 09:41:54,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 09:41:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 09:41:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 09:41:54,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:54,936 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:54,936 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:54,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2018-10-23 09:41:54,937 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:54,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:54,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:54,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,949 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:54,949 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:54,949 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 09:41:54,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:54,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-23 09:41:54,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:54,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:55,190 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 09:41:55,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:55,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-23 09:41:55,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:41:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:41:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:41:55,222 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-10-23 09:41:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:55,397 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-23 09:41:55,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 09:41:55,397 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-10-23 09:41:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:55,398 INFO L225 Difference]: With dead ends: 21 [2018-10-23 09:41:55,398 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 09:41:55,399 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 09:41:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 09:41:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-23 09:41:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 09:41:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-23 09:41:55,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-23 09:41:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:55,404 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-23 09:41:55,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:41:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-23 09:41:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-23 09:41:55,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:55,405 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:55,405 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:55,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2018-10-23 09:41:55,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:55,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:55,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:55,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:55,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:55,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:55,421 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:55,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:41:55,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:55,524 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:55,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:55,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:55,965 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 09:41:55,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:55,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-23 09:41:55,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 09:41:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 09:41:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:41:55,987 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2018-10-23 09:41:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:56,211 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 09:41:56,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 09:41:56,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-10-23 09:41:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:56,212 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:41:56,213 INFO L226 Difference]: Without dead ends: 19 [2018-10-23 09:41:56,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:41:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-23 09:41:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-23 09:41:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-23 09:41:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-23 09:41:56,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-23 09:41:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:56,218 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-23 09:41:56,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 09:41:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-23 09:41:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 09:41:56,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:56,219 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:56,219 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:56,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2018-10-23 09:41:56,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:56,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:56,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:56,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:56,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:56,230 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:56,231 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:56,231 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 09:41:56,243 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:56,272 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-23 09:41:56,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:56,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:56,630 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 09:41:56,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:56,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-23 09:41:56,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 09:41:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 09:41:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:41:56,653 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-10-23 09:41:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:57,177 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-23 09:41:57,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 09:41:57,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-10-23 09:41:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:57,179 INFO L225 Difference]: With dead ends: 23 [2018-10-23 09:41:57,179 INFO L226 Difference]: Without dead ends: 20 [2018-10-23 09:41:57,180 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 09:41:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-23 09:41:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-23 09:41:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 09:41:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 09:41:57,184 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-23 09:41:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:57,186 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 09:41:57,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 09:41:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 09:41:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 09:41:57,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:57,187 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:57,187 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:57,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2018-10-23 09:41:57,188 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:57,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:57,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:57,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:57,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:57,198 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 09:41:57,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:57,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 09:41:57,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:57,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:57,541 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 09:41:57,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:41:57,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-23 09:41:57,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 09:41:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 09:41:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:41:57,564 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2018-10-23 09:41:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:58,060 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-23 09:41:58,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:41:58,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2018-10-23 09:41:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:58,062 INFO L225 Difference]: With dead ends: 24 [2018-10-23 09:41:58,062 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:41:58,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:41:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:41:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-23 09:41:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-23 09:41:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-23 09:41:58,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-23 09:41:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:58,068 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-23 09:41:58,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 09:41:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-23 09:41:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 09:41:58,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:58,069 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:58,070 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:58,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:58,070 INFO L82 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2018-10-23 09:41:58,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:58,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:58,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:58,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:58,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:58,081 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:41:58,081 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:41:58,081 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 09:41:58,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:58,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:00,023 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 09:42:00,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:00,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-23 09:42:00,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:42:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:42:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:42:00,045 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2018-10-23 09:42:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:00,254 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 09:42:00,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 09:42:00,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-10-23 09:42:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:00,256 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:42:00,256 INFO L226 Difference]: Without dead ends: 22 [2018-10-23 09:42:00,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:42:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-23 09:42:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-23 09:42:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 09:42:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-23 09:42:00,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-23 09:42:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:00,262 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-23 09:42:00,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:42:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-23 09:42:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 09:42:00,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:00,263 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:00,263 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:00,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2018-10-23 09:42:00,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:00,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:00,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:00,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:00,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:00,274 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:00,274 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:00,274 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 09:42:00,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:00,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:00,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:00,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:00,639 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 09:42:00,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:00,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-23 09:42:00,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 09:42:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 09:42:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:42:00,661 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2018-10-23 09:42:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:01,143 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-23 09:42:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:42:01,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-10-23 09:42:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:01,144 INFO L225 Difference]: With dead ends: 26 [2018-10-23 09:42:01,144 INFO L226 Difference]: Without dead ends: 23 [2018-10-23 09:42:01,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:42:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-23 09:42:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-23 09:42:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 09:42:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 09:42:01,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-23 09:42:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:01,149 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 09:42:01,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 09:42:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 09:42:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 09:42:01,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:01,150 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:01,151 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:01,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:01,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2018-10-23 09:42:01,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:01,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:01,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:01,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:01,161 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:01,162 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:01,162 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 09:42:01,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:01,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-23 09:42:01,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:01,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:01,805 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 09:42:01,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:01,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-23 09:42:01,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:42:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:42:01,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:42:01,827 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2018-10-23 09:42:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:02,115 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-23 09:42:02,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:42:02,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2018-10-23 09:42:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:02,117 INFO L225 Difference]: With dead ends: 27 [2018-10-23 09:42:02,118 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 09:42:02,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:42:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 09:42:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-23 09:42:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-23 09:42:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-23 09:42:02,123 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-23 09:42:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:02,123 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-23 09:42:02,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:42:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-23 09:42:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:42:02,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:02,125 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:02,125 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:02,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2018-10-23 09:42:02,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:02,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:02,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:02,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:02,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:02,136 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 09:42:02,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:02,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:02,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:02,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:02,610 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 09:42:02,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:02,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-23 09:42:02,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 09:42:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 09:42:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:42:02,632 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2018-10-23 09:42:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:02,979 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 09:42:02,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 09:42:02,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-10-23 09:42:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:02,980 INFO L225 Difference]: With dead ends: 28 [2018-10-23 09:42:02,980 INFO L226 Difference]: Without dead ends: 25 [2018-10-23 09:42:02,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:42:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-23 09:42:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-23 09:42:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 09:42:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-23 09:42:02,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-23 09:42:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:02,985 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-23 09:42:02,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 09:42:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-23 09:42:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 09:42:02,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:02,986 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:02,987 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:02,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2018-10-23 09:42:02,987 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:02,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,997 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:02,997 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:02,997 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:42:03,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:03,036 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-23 09:42:03,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:03,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:03,359 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 09:42:03,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:03,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-23 09:42:03,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 09:42:03,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 09:42:03,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:42:03,382 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2018-10-23 09:42:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:03,776 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-23 09:42:03,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 09:42:03,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2018-10-23 09:42:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:03,778 INFO L225 Difference]: With dead ends: 29 [2018-10-23 09:42:03,778 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 09:42:03,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:42:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 09:42:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-23 09:42:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 09:42:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 09:42:03,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-23 09:42:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:03,783 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 09:42:03,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 09:42:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 09:42:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:42:03,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:03,783 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:03,784 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:03,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2018-10-23 09:42:03,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:03,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:03,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:03,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:03,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:03,793 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:03,794 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:03,794 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 09:42:03,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:03,843 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-23 09:42:03,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:03,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:04,146 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 09:42:04,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:04,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-23 09:42:04,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:42:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:42:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:42:04,170 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-10-23 09:42:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:04,506 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-23 09:42:04,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:42:04,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-10-23 09:42:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:04,508 INFO L225 Difference]: With dead ends: 30 [2018-10-23 09:42:04,508 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 09:42:04,509 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 09:42:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 09:42:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-23 09:42:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 09:42:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-23 09:42:04,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-23 09:42:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:04,514 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-23 09:42:04,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:42:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-23 09:42:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 09:42:04,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:04,515 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:04,515 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:04,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2018-10-23 09:42:04,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:04,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:04,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:04,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,525 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:04,525 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:04,525 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) [2018-10-23 09:42:04,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:04,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:04,927 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 09:42:04,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:04,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-23 09:42:04,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 09:42:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 09:42:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:42:04,950 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2018-10-23 09:42:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:05,340 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 09:42:05,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 09:42:05,340 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-10-23 09:42:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:05,341 INFO L225 Difference]: With dead ends: 31 [2018-10-23 09:42:05,341 INFO L226 Difference]: Without dead ends: 28 [2018-10-23 09:42:05,342 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 09:42:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-23 09:42:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-23 09:42:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-23 09:42:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-23 09:42:05,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-23 09:42:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:05,347 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-23 09:42:05,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 09:42:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-23 09:42:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-23 09:42:05,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:05,348 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:05,349 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:05,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2018-10-23 09:42:05,349 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:05,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:05,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:05,358 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:05,359 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:05,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:42:05,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:05,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:05,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:05,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:06,051 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 09:42:06,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:06,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-23 09:42:06,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 09:42:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 09:42:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:42:06,082 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2018-10-23 09:42:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:06,831 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-23 09:42:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 09:42:06,832 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-10-23 09:42:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:06,833 INFO L225 Difference]: With dead ends: 32 [2018-10-23 09:42:06,833 INFO L226 Difference]: Without dead ends: 29 [2018-10-23 09:42:06,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:42:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-23 09:42:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-23 09:42:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 09:42:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 09:42:06,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-23 09:42:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:06,839 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 09:42:06,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 09:42:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 09:42:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 09:42:06,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:06,841 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:06,842 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:06,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2018-10-23 09:42:06,842 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:06,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:06,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:06,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:06,851 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:06,851 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 09:42:06,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:06,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-23 09:42:06,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:06,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:07,448 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 09:42:07,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:07,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-23 09:42:07,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:42:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:42:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:42:07,472 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2018-10-23 09:42:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:08,172 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-23 09:42:08,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 09:42:08,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2018-10-23 09:42:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:08,174 INFO L225 Difference]: With dead ends: 33 [2018-10-23 09:42:08,174 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 09:42:08,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:42:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 09:42:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-23 09:42:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-23 09:42:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-23 09:42:08,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-23 09:42:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:08,180 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-23 09:42:08,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:42:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-23 09:42:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 09:42:08,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:08,181 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:08,182 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:08,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:08,182 INFO L82 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2018-10-23 09:42:08,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:08,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:08,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:08,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:08,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:08,192 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:08,192 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:08,192 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 09:42:08,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:08,450 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:08,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:08,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:09,453 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 09:42:09,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:09,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-23 09:42:09,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 09:42:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 09:42:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:42:09,478 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2018-10-23 09:42:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:09,983 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 09:42:09,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:42:09,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2018-10-23 09:42:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:09,984 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:42:09,984 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 09:42:09,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:42:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 09:42:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-23 09:42:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 09:42:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-23 09:42:09,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-23 09:42:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:09,991 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-23 09:42:09,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 09:42:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-23 09:42:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-23 09:42:09,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:09,992 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:09,992 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:09,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2018-10-23 09:42:09,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:09,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:09,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:10,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:10,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:10,001 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) [2018-10-23 09:42:10,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:10,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-23 09:42:10,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:10,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:10,477 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 09:42:10,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:10,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-23 09:42:10,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 09:42:10,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 09:42:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:42:10,498 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2018-10-23 09:42:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:10,975 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-23 09:42:10,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 09:42:10,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2018-10-23 09:42:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:10,976 INFO L225 Difference]: With dead ends: 35 [2018-10-23 09:42:10,976 INFO L226 Difference]: Without dead ends: 32 [2018-10-23 09:42:10,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:42:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-23 09:42:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-23 09:42:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 09:42:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 09:42:10,982 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-23 09:42:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:10,983 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 09:42:10,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 09:42:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 09:42:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:42:10,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:10,984 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:10,984 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:10,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2018-10-23 09:42:10,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:10,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:10,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:10,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:10,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:10,993 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:10,994 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:10,994 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 09:42:11,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:11,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 09:42:11,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:11,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:11,661 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 09:42:11,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:11,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-23 09:42:11,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:42:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:42:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:42:11,682 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2018-10-23 09:42:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:12,187 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-23 09:42:12,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:42:12,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2018-10-23 09:42:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:12,189 INFO L225 Difference]: With dead ends: 36 [2018-10-23 09:42:12,189 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 09:42:12,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:42:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 09:42:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-23 09:42:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-23 09:42:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-23 09:42:12,195 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-23 09:42:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:12,195 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-23 09:42:12,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:42:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-23 09:42:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-23 09:42:12,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:12,196 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:12,196 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:12,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2018-10-23 09:42:12,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:12,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:12,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:12,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:12,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:12,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:12,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:12,205 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:12,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:12,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:12,768 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 09:42:12,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:12,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-23 09:42:12,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 09:42:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 09:42:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:42:12,789 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2018-10-23 09:42:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:13,315 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 09:42:13,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 09:42:13,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2018-10-23 09:42:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:13,316 INFO L225 Difference]: With dead ends: 37 [2018-10-23 09:42:13,316 INFO L226 Difference]: Without dead ends: 34 [2018-10-23 09:42:13,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:42:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-23 09:42:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-23 09:42:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-23 09:42:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-23 09:42:13,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-23 09:42:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:13,322 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-23 09:42:13,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 09:42:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-23 09:42:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 09:42:13,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:13,323 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:13,323 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:13,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2018-10-23 09:42:13,324 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:13,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:13,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:13,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,332 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:13,332 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:13,332 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) [2018-10-23 09:42:13,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:13,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:13,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:13,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:14,070 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 09:42:14,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:14,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-23 09:42:14,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-23 09:42:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-23 09:42:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:42:14,092 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2018-10-23 09:42:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:14,708 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-23 09:42:14,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 09:42:14,708 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2018-10-23 09:42:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:14,709 INFO L225 Difference]: With dead ends: 38 [2018-10-23 09:42:14,709 INFO L226 Difference]: Without dead ends: 35 [2018-10-23 09:42:14,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:42:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-23 09:42:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-23 09:42:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 09:42:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 09:42:14,715 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-23 09:42:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:14,715 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 09:42:14,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-23 09:42:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 09:42:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 09:42:14,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:14,716 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:14,716 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:14,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2018-10-23 09:42:14,717 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:14,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:14,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:14,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:14,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:14,726 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:14,726 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:14,726 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:14,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:15,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-23 09:42:15,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:15,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:15,799 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 09:42:15,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:15,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-23 09:42:15,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:42:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:42:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:42:15,822 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2018-10-23 09:42:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:16,609 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-23 09:42:16,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 09:42:16,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2018-10-23 09:42:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:16,610 INFO L225 Difference]: With dead ends: 39 [2018-10-23 09:42:16,611 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 09:42:16,611 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 09:42:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 09:42:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-23 09:42:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-23 09:42:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-23 09:42:16,616 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-23 09:42:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:16,616 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-23 09:42:16,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:42:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-23 09:42:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-23 09:42:16,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:16,617 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:16,617 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:16,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2018-10-23 09:42:16,618 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:16,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:16,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:16,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:16,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:16,625 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:16,625 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:16,626 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 09:42:16,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:16,937 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:16,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:16,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:17,512 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 09:42:17,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:17,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-23 09:42:17,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:42:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:42:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:42:17,535 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2018-10-23 09:42:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:18,258 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 09:42:18,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:42:18,258 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2018-10-23 09:42:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:18,259 INFO L225 Difference]: With dead ends: 40 [2018-10-23 09:42:18,259 INFO L226 Difference]: Without dead ends: 37 [2018-10-23 09:42:18,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:42:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-23 09:42:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-23 09:42:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-23 09:42:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-23 09:42:18,264 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-23 09:42:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:18,272 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-23 09:42:18,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:42:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-23 09:42:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-23 09:42:18,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:18,273 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:18,273 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:18,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2018-10-23 09:42:18,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:18,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:18,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:18,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:18,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:18,286 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:18,287 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:18,287 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 09:42:18,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:18,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-23 09:42:18,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:18,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:18,916 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 09:42:18,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:18,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-23 09:42:18,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-23 09:42:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-23 09:42:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:42:18,938 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2018-10-23 09:42:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:19,675 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-23 09:42:19,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-23 09:42:19,675 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2018-10-23 09:42:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:19,676 INFO L225 Difference]: With dead ends: 41 [2018-10-23 09:42:19,676 INFO L226 Difference]: Without dead ends: 38 [2018-10-23 09:42:19,677 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 09:42:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-23 09:42:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-23 09:42:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 09:42:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 09:42:19,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-23 09:42:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:19,682 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 09:42:19,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-23 09:42:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 09:42:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 09:42:19,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:19,682 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:19,682 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:19,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2018-10-23 09:42:19,683 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:19,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:19,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:19,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:19,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:19,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:19,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:19,690 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 09:42:19,701 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:19,836 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-23 09:42:19,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:19,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:20,426 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 09:42:20,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:20,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-23 09:42:20,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 09:42:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 09:42:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:42:20,449 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2018-10-23 09:42:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:21,231 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-23 09:42:21,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:42:21,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2018-10-23 09:42:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:21,232 INFO L225 Difference]: With dead ends: 42 [2018-10-23 09:42:21,232 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:42:21,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:42:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:42:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-23 09:42:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-23 09:42:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-23 09:42:21,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-23 09:42:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:21,238 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-23 09:42:21,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 09:42:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-23 09:42:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 09:42:21,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:21,239 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:21,240 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:21,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2018-10-23 09:42:21,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:21,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:21,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:21,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:21,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:21,247 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:21,247 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:21,247 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 09:42:21,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:21,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:22,413 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 09:42:22,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:22,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-23 09:42:22,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-23 09:42:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-23 09:42:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:42:22,434 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2018-10-23 09:42:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:23,276 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 09:42:23,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-23 09:42:23,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2018-10-23 09:42:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:23,277 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:42:23,277 INFO L226 Difference]: Without dead ends: 40 [2018-10-23 09:42:23,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:42:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-23 09:42:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-23 09:42:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-23 09:42:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-23 09:42:23,283 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-23 09:42:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:23,284 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-23 09:42:23,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-23 09:42:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-23 09:42:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-23 09:42:23,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:23,285 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:23,285 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:23,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2018-10-23 09:42:23,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:23,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:23,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:23,293 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:23,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:23,293 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 09:42:23,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:23,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:23,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:23,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:24,025 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 09:42:24,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:24,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-23 09:42:24,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-23 09:42:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-23 09:42:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:42:24,047 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2018-10-23 09:42:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:24,967 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-23 09:42:24,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 09:42:24,967 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2018-10-23 09:42:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:24,968 INFO L225 Difference]: With dead ends: 44 [2018-10-23 09:42:24,968 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 09:42:24,969 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 09:42:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 09:42:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-23 09:42:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 09:42:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 09:42:24,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-23 09:42:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:24,973 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 09:42:24,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-23 09:42:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 09:42:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 09:42:24,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:24,974 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:24,974 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:24,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2018-10-23 09:42:24,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:24,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:24,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:24,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:24,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:24,983 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:24,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:24,983 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 09:42:24,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:25,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-23 09:42:25,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:25,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:27,027 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 09:42:27,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:27,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-23 09:42:27,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:42:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:42:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:42:27,049 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2018-10-23 09:42:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:27,968 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-23 09:42:27,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:42:27,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2018-10-23 09:42:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:27,969 INFO L225 Difference]: With dead ends: 45 [2018-10-23 09:42:27,969 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 09:42:27,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:42:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 09:42:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-23 09:42:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-23 09:42:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-23 09:42:27,974 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-23 09:42:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:27,974 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-23 09:42:27,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:42:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-23 09:42:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-23 09:42:27,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:27,975 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:27,975 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:27,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2018-10-23 09:42:27,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:27,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:27,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:27,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:27,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:27,982 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:27,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:27,983 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) [2018-10-23 09:42:27,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:42:28,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:28,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:28,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:30,344 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 09:42:30,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:30,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-23 09:42:30,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-23 09:42:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-23 09:42:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:42:30,366 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2018-10-23 09:42:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:31,366 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 09:42:31,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-23 09:42:31,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2018-10-23 09:42:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:31,367 INFO L225 Difference]: With dead ends: 46 [2018-10-23 09:42:31,368 INFO L226 Difference]: Without dead ends: 43 [2018-10-23 09:42:31,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:42:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-23 09:42:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-23 09:42:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-23 09:42:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-23 09:42:31,372 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-23 09:42:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:31,372 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-23 09:42:31,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-23 09:42:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-23 09:42:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-23 09:42:31,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:31,373 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:31,373 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:31,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2018-10-23 09:42:31,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:31,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:31,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:31,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:31,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:31,382 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:31,382 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:31,382 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 09:42:31,395 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:31,461 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-23 09:42:31,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:31,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:32,699 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 09:42:32,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:32,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-23 09:42:32,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-23 09:42:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-23 09:42:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:42:32,721 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2018-10-23 09:42:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:33,772 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-23 09:42:33,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-23 09:42:33,772 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2018-10-23 09:42:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:33,773 INFO L225 Difference]: With dead ends: 47 [2018-10-23 09:42:33,773 INFO L226 Difference]: Without dead ends: 44 [2018-10-23 09:42:33,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:42:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-23 09:42:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-23 09:42:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 09:42:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 09:42:33,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-23 09:42:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:33,776 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 09:42:33,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-23 09:42:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 09:42:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:42:33,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:33,777 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:33,777 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:33,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:33,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2018-10-23 09:42:33,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:33,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:33,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:33,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:33,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:33,785 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:33,785 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:33,785 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 09:42:33,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:34,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-23 09:42:34,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:34,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:34,836 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 09:42:34,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:34,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-23 09:42:34,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:42:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:42:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:42:34,858 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2018-10-23 09:42:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:35,967 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-23 09:42:35,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:42:35,967 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2018-10-23 09:42:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:35,968 INFO L225 Difference]: With dead ends: 48 [2018-10-23 09:42:35,968 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 09:42:35,969 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 09:42:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 09:42:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-23 09:42:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-23 09:42:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-23 09:42:35,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-23 09:42:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-23 09:42:35,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:42:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-23 09:42:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-23 09:42:35,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:35,974 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:35,974 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:35,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2018-10-23 09:42:35,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:35,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:35,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:35,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:35,982 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:35,982 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 09:42:35,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:36,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:37,100 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 09:42:37,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:37,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-23 09:42:37,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-23 09:42:37,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-23 09:42:37,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:42:37,122 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2018-10-23 09:42:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:38,308 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 09:42:38,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-23 09:42:38,309 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2018-10-23 09:42:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:38,310 INFO L225 Difference]: With dead ends: 49 [2018-10-23 09:42:38,310 INFO L226 Difference]: Without dead ends: 46 [2018-10-23 09:42:38,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:42:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-23 09:42:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-23 09:42:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-23 09:42:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-23 09:42:38,315 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-23 09:42:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:38,316 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-23 09:42:38,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-23 09:42:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-23 09:42:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-23 09:42:38,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:38,316 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:38,317 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:38,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2018-10-23 09:42:38,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:38,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:38,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:38,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:38,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:38,324 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:38,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:38,325 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 09:42:38,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:38,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:38,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:38,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:39,979 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 09:42:40,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:40,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-23 09:42:40,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-23 09:42:40,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-23 09:42:40,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:42:40,002 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2018-10-23 09:42:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:41,203 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-23 09:42:41,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-23 09:42:41,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2018-10-23 09:42:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:41,204 INFO L225 Difference]: With dead ends: 50 [2018-10-23 09:42:41,204 INFO L226 Difference]: Without dead ends: 47 [2018-10-23 09:42:41,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:42:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-23 09:42:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-23 09:42:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 09:42:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 09:42:41,210 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-23 09:42:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:41,210 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 09:42:41,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-23 09:42:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 09:42:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 09:42:41,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:41,211 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:41,211 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:41,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2018-10-23 09:42:41,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:41,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:41,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:41,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,220 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:41,220 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:41,220 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 09:42:41,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:42,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-23 09:42:42,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:42,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:43,558 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 09:42:43,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:43,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-23 09:42:43,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:42:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:42:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:42:43,580 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2018-10-23 09:42:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:44,829 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-23 09:42:44,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:42:44,829 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2018-10-23 09:42:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:44,830 INFO L225 Difference]: With dead ends: 51 [2018-10-23 09:42:44,830 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:42:44,832 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 09:42:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:42:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-23 09:42:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 09:42:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-23 09:42:44,836 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-23 09:42:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:44,836 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-23 09:42:44,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:42:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-23 09:42:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 09:42:44,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:44,837 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:44,837 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:44,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:44,838 INFO L82 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2018-10-23 09:42:44,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:44,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:44,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:44,846 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:44,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:44,846 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 09:42:44,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:45,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:45,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:45,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:46,249 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 09:42:46,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:46,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-23 09:42:46,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-23 09:42:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-23 09:42:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:42:46,272 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2018-10-23 09:42:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:47,717 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 09:42:47,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-23 09:42:47,717 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2018-10-23 09:42:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:47,718 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:42:47,718 INFO L226 Difference]: Without dead ends: 49 [2018-10-23 09:42:47,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:42:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-23 09:42:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-23 09:42:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-23 09:42:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-23 09:42:47,723 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-23 09:42:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:47,723 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-23 09:42:47,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-23 09:42:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-23 09:42:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-23 09:42:47,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:47,724 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:47,724 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:47,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2018-10-23 09:42:47,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:47,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:47,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:47,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:47,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:47,732 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:47,733 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:47,733 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 09:42:47,748 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:47,846 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-23 09:42:47,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:47,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:48,821 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 09:42:48,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:48,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-23 09:42:48,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-23 09:42:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-23 09:42:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:42:48,845 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2018-10-23 09:42:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:50,286 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-23 09:42:50,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-23 09:42:50,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2018-10-23 09:42:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:50,287 INFO L225 Difference]: With dead ends: 53 [2018-10-23 09:42:50,287 INFO L226 Difference]: Without dead ends: 50 [2018-10-23 09:42:50,289 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 09:42:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-23 09:42:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-23 09:42:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 09:42:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 09:42:50,293 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-23 09:42:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:50,294 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 09:42:50,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-23 09:42:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 09:42:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 09:42:50,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:50,294 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:50,295 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:50,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2018-10-23 09:42:50,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:50,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:50,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:50,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:50,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:50,302 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:50,302 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:50,302 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 09:42:50,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:50,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-23 09:42:50,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:50,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:51,768 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 09:42:51,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:51,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-23 09:42:51,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:42:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:42:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:42:51,791 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2018-10-23 09:42:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:53,480 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-23 09:42:53,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:42:53,480 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2018-10-23 09:42:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:53,481 INFO L225 Difference]: With dead ends: 54 [2018-10-23 09:42:53,482 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 09:42:53,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:42:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 09:42:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-23 09:42:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-23 09:42:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-23 09:42:53,486 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-23 09:42:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:53,486 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-23 09:42:53,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:42:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-23 09:42:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-23 09:42:53,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:53,487 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:53,487 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:53,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2018-10-23 09:42:53,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:53,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:53,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:53,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:53,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:53,496 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:53,496 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:53,496 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 09:42:53,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:53,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:54,660 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 09:42:54,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:54,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-23 09:42:54,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-23 09:42:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-23 09:42:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:42:54,683 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2018-10-23 09:42:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:56,203 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 09:42:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-23 09:42:56,203 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2018-10-23 09:42:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:56,204 INFO L225 Difference]: With dead ends: 55 [2018-10-23 09:42:56,204 INFO L226 Difference]: Without dead ends: 52 [2018-10-23 09:42:56,205 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 09:42:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-23 09:42:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-23 09:42:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-23 09:42:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-23 09:42:56,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-23 09:42:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:56,208 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-23 09:42:56,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-23 09:42:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-23 09:42:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-23 09:42:56,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:56,209 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:56,209 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:56,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2018-10-23 09:42:56,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:56,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:56,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:56,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:56,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:56,217 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:56,217 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:56,217 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 09:42:56,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:56,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:56,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:56,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:57,615 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 09:42:57,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:42:57,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-23 09:42:57,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-23 09:42:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-23 09:42:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 09:42:57,637 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2018-10-23 09:42:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:59,278 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-23 09:42:59,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-23 09:42:59,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2018-10-23 09:42:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:59,280 INFO L225 Difference]: With dead ends: 56 [2018-10-23 09:42:59,280 INFO L226 Difference]: Without dead ends: 53 [2018-10-23 09:42:59,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:42:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-23 09:42:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-23 09:42:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 09:42:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 09:42:59,285 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-23 09:42:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:59,286 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 09:42:59,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-23 09:42:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 09:42:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 09:42:59,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:59,286 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:59,286 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:59,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:59,287 INFO L82 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2018-10-23 09:42:59,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:59,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:59,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:59,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,295 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:42:59,295 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:42:59,295 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 09:42:59,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:01,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-23 09:43:01,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:01,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:03,530 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 09:43:03,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:03,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-23 09:43:03,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:43:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:43:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:43:03,552 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2018-10-23 09:43:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:05,174 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-23 09:43:05,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 09:43:05,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2018-10-23 09:43:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:05,175 INFO L225 Difference]: With dead ends: 57 [2018-10-23 09:43:05,175 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 09:43:05,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:43:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 09:43:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-23 09:43:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-23 09:43:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-23 09:43:05,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-23 09:43:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:05,180 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-23 09:43:05,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:43:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-23 09:43:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 09:43:05,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:05,180 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:05,180 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:05,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2018-10-23 09:43:05,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:05,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:05,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:05,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:05,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:05,188 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 09:43:05,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:05,878 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:05,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:05,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:07,044 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 09:43:07,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:07,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-23 09:43:07,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 09:43:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 09:43:07,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:43:07,067 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2018-10-23 09:43:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:08,871 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 09:43:08,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 09:43:08,871 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2018-10-23 09:43:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:08,872 INFO L225 Difference]: With dead ends: 58 [2018-10-23 09:43:08,872 INFO L226 Difference]: Without dead ends: 55 [2018-10-23 09:43:08,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:43:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-23 09:43:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-23 09:43:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-23 09:43:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-23 09:43:08,877 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-23 09:43:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:08,877 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-23 09:43:08,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 09:43:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-23 09:43:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-23 09:43:08,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:08,877 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:08,878 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:08,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2018-10-23 09:43:08,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:08,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:08,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:08,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:08,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:08,886 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:08,886 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:08,886 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 09:43:08,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:09,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-23 09:43:09,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:09,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:10,334 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 09:43:10,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:10,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-23 09:43:10,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-23 09:43:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-23 09:43:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:43:10,358 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2018-10-23 09:43:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:12,125 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-23 09:43:12,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-23 09:43:12,125 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2018-10-23 09:43:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:12,126 INFO L225 Difference]: With dead ends: 59 [2018-10-23 09:43:12,126 INFO L226 Difference]: Without dead ends: 56 [2018-10-23 09:43:12,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:43:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-23 09:43:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-23 09:43:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 09:43:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 09:43:12,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-23 09:43:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:12,132 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 09:43:12,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-23 09:43:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 09:43:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 09:43:12,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:12,132 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:12,132 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:12,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2018-10-23 09:43:12,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:12,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:12,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:12,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:12,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:12,140 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:12,140 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:12,140 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 09:43:12,147 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:43:12,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-23 09:43:12,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:12,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:14,291 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 09:43:14,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:14,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-23 09:43:14,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:43:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:43:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:43:14,313 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2018-10-23 09:43:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:16,164 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-23 09:43:16,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:43:16,164 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2018-10-23 09:43:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:16,164 INFO L225 Difference]: With dead ends: 60 [2018-10-23 09:43:16,165 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 09:43:16,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:43:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 09:43:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-23 09:43:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-23 09:43:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-23 09:43:16,170 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-23 09:43:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:16,171 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-23 09:43:16,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:43:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-23 09:43:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-23 09:43:16,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:16,171 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:16,172 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:16,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2018-10-23 09:43:16,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:16,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:16,180 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:16,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:16,181 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 09:43:16,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:16,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:18,057 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 09:43:18,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:18,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-23 09:43:18,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-23 09:43:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-23 09:43:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:43:18,078 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2018-10-23 09:43:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:19,969 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 09:43:19,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-23 09:43:19,969 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2018-10-23 09:43:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:19,970 INFO L225 Difference]: With dead ends: 61 [2018-10-23 09:43:19,970 INFO L226 Difference]: Without dead ends: 58 [2018-10-23 09:43:19,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:43:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-23 09:43:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-23 09:43:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-23 09:43:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-23 09:43:19,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-23 09:43:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-23 09:43:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-23 09:43:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-23 09:43:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-23 09:43:19,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:19,978 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:19,978 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:19,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:19,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2018-10-23 09:43:19,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:19,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:19,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:19,986 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:19,986 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:19,986 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 09:43:20,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:20,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:20,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:20,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:21,445 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 09:43:21,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:21,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-23 09:43:21,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-23 09:43:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-23 09:43:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:43:21,467 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2018-10-23 09:43:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:23,584 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-23 09:43:23,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-23 09:43:23,585 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2018-10-23 09:43:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:23,585 INFO L225 Difference]: With dead ends: 62 [2018-10-23 09:43:23,585 INFO L226 Difference]: Without dead ends: 59 [2018-10-23 09:43:23,586 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 09:43:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-23 09:43:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-23 09:43:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 09:43:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 09:43:23,590 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-23 09:43:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:23,591 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 09:43:23,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-23 09:43:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 09:43:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 09:43:23,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:23,591 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:23,592 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:23,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2018-10-23 09:43:23,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:23,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:23,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:23,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:23,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:23,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:23,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:23,600 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 09:43:23,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:28,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-23 09:43:28,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:28,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:29,760 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 09:43:29,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:29,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-23 09:43:29,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-23 09:43:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-23 09:43:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:43:29,782 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2018-10-23 09:43:31,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:31,850 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-23 09:43:31,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-23 09:43:31,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2018-10-23 09:43:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:31,851 INFO L225 Difference]: With dead ends: 63 [2018-10-23 09:43:31,852 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 09:43:31,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:43:31,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 09:43:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-23 09:43:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-23 09:43:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-23 09:43:31,856 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-23 09:43:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:31,856 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-23 09:43:31,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-23 09:43:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-23 09:43:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-23 09:43:31,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:31,857 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:31,857 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:31,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2018-10-23 09:43:31,857 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:31,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:31,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:31,864 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:31,865 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:31,865 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 09:43:31,874 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:32,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:32,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:32,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:34,302 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 09:43:34,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:34,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-23 09:43:34,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-23 09:43:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-23 09:43:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:43:34,323 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2018-10-23 09:43:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:36,406 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 09:43:36,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-23 09:43:36,406 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2018-10-23 09:43:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:36,407 INFO L225 Difference]: With dead ends: 64 [2018-10-23 09:43:36,407 INFO L226 Difference]: Without dead ends: 61 [2018-10-23 09:43:36,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:43:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-23 09:43:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-23 09:43:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-23 09:43:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-23 09:43:36,412 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-23 09:43:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:36,412 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-23 09:43:36,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-23 09:43:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-23 09:43:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-23 09:43:36,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:36,412 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:36,413 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:36,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2018-10-23 09:43:36,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:36,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:36,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:36,420 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:36,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:36,420 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:43:36,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:36,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-23 09:43:36,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:36,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:38,118 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 09:43:38,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:38,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-23 09:43:38,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-23 09:43:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-23 09:43:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:43:38,140 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states. [2018-10-23 09:43:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:40,470 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-23 09:43:40,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-23 09:43:40,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 60 [2018-10-23 09:43:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:40,472 INFO L225 Difference]: With dead ends: 65 [2018-10-23 09:43:40,472 INFO L226 Difference]: Without dead ends: 62 [2018-10-23 09:43:40,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:43:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-23 09:43:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-23 09:43:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-23 09:43:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-23 09:43:40,478 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-23 09:43:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:40,479 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-23 09:43:40,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-23 09:43:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-23 09:43:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 09:43:40,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:40,479 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:40,480 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:40,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1506835125, now seen corresponding path program 54 times [2018-10-23 09:43:40,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:40,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:40,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:40,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:40,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:40,488 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) [2018-10-23 09:43:40,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:43:41,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-23 09:43:41,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:41,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:43,425 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 09:43:43,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:43,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-23 09:43:43,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-23 09:43:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-23 09:43:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:43:43,447 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 58 states. [2018-10-23 09:43:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:45,795 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-23 09:43:45,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-23 09:43:45,796 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 61 [2018-10-23 09:43:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:45,797 INFO L225 Difference]: With dead ends: 66 [2018-10-23 09:43:45,797 INFO L226 Difference]: Without dead ends: 63 [2018-10-23 09:43:45,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:43:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-23 09:43:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-23 09:43:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-23 09:43:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-23 09:43:45,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-23 09:43:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:45,803 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-23 09:43:45,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-23 09:43:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-23 09:43:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-23 09:43:45,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:45,803 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:45,804 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:45,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash 532688907, now seen corresponding path program 55 times [2018-10-23 09:43:45,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:45,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:45,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:45,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:45,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:45,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:45,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:45,812 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 09:43:45,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:45,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:47,565 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 09:43:47,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:47,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-23 09:43:47,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-23 09:43:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-23 09:43:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:43:47,587 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 59 states. [2018-10-23 09:43:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:50,125 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-23 09:43:50,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-23 09:43:50,126 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 62 [2018-10-23 09:43:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:50,127 INFO L225 Difference]: With dead ends: 67 [2018-10-23 09:43:50,127 INFO L226 Difference]: Without dead ends: 64 [2018-10-23 09:43:50,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:43:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-23 09:43:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-23 09:43:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-23 09:43:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-23 09:43:50,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-23 09:43:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:50,133 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-23 09:43:50,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-23 09:43:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-23 09:43:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-23 09:43:50,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:50,133 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:50,133 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:50,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash -666575541, now seen corresponding path program 56 times [2018-10-23 09:43:50,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:50,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:50,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:50,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:50,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:50,141 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:50,141 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:50,142 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 09:43:50,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:50,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:50,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:50,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:52,075 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 09:43:52,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:43:52,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-23 09:43:52,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-23 09:43:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-23 09:43:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:43:52,096 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 60 states. [2018-10-23 09:43:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:54,669 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-23 09:43:54,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-23 09:43:54,669 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2018-10-23 09:43:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:54,670 INFO L225 Difference]: With dead ends: 68 [2018-10-23 09:43:54,670 INFO L226 Difference]: Without dead ends: 65 [2018-10-23 09:43:54,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:43:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-23 09:43:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-23 09:43:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 09:43:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-23 09:43:54,675 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-23 09:43:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:54,675 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-23 09:43:54,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-23 09:43:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-23 09:43:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 09:43:54,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:54,676 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:54,676 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:54,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 810932235, now seen corresponding path program 57 times [2018-10-23 09:43:54,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:54,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:54,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:54,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:54,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:54,684 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:43:54,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:43:54,685 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) [2018-10-23 09:43:54,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:02,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-23 09:44:02,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:02,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:04,481 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 09:44:04,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:04,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-23 09:44:04,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-23 09:44:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-23 09:44:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:44:04,504 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 61 states. [2018-10-23 09:44:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:06,959 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-23 09:44:06,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-23 09:44:06,960 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 64 [2018-10-23 09:44:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:06,960 INFO L225 Difference]: With dead ends: 69 [2018-10-23 09:44:06,960 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 09:44:06,961 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 09:44:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 09:44:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-23 09:44:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-23 09:44:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-23 09:44:06,965 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-23 09:44:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:06,966 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-23 09:44:06,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-23 09:44:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-23 09:44:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-23 09:44:06,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:06,966 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:06,966 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:06,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -630966965, now seen corresponding path program 58 times [2018-10-23 09:44:06,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:06,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:06,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:06,974 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:06,974 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:06,974 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 09:44:06,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:44:07,897 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:44:07,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:07,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:09,879 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 09:44:09,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:09,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-23 09:44:09,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-23 09:44:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-23 09:44:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:44:09,901 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 62 states. [2018-10-23 09:44:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:12,442 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-23 09:44:12,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-23 09:44:12,443 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2018-10-23 09:44:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:12,444 INFO L225 Difference]: With dead ends: 70 [2018-10-23 09:44:12,444 INFO L226 Difference]: Without dead ends: 67 [2018-10-23 09:44:12,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:44:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-23 09:44:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-23 09:44:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-23 09:44:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-23 09:44:12,450 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-23 09:44:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:12,450 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-23 09:44:12,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-23 09:44:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-23 09:44:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-23 09:44:12,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:12,451 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:12,451 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:12,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1914798091, now seen corresponding path program 59 times [2018-10-23 09:44:12,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:12,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:12,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:12,458 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:12,458 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:12,458 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 09:44:12,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:44:12,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-23 09:44:12,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:12,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:15,469 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 09:44:15,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:15,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-23 09:44:15,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-23 09:44:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-23 09:44:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:44:15,492 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 63 states. [2018-10-23 09:44:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:18,106 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-23 09:44:18,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-23 09:44:18,106 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 66 [2018-10-23 09:44:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:18,107 INFO L225 Difference]: With dead ends: 71 [2018-10-23 09:44:18,107 INFO L226 Difference]: Without dead ends: 68 [2018-10-23 09:44:18,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:44:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-23 09:44:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-23 09:44:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 09:44:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-23 09:44:18,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-23 09:44:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:18,113 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-23 09:44:18,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-23 09:44:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-23 09:44:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 09:44:18,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:18,113 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:18,114 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:18,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash -770863797, now seen corresponding path program 60 times [2018-10-23 09:44:18,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:18,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:18,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:18,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:18,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:18,122 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 09:44:18,132 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:44:19,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-23 09:44:19,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:19,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:21,826 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 09:44:21,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:21,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-23 09:44:21,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-23 09:44:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-23 09:44:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:44:21,848 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 64 states. [2018-10-23 09:44:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:24,773 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-23 09:44:24,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-23 09:44:24,774 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2018-10-23 09:44:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:24,775 INFO L225 Difference]: With dead ends: 72 [2018-10-23 09:44:24,775 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 09:44:24,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:44:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 09:44:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-23 09:44:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-23 09:44:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-23 09:44:24,780 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-23 09:44:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:24,780 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-23 09:44:24,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-23 09:44:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-23 09:44:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-23 09:44:24,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:24,781 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:24,781 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:24,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1872963595, now seen corresponding path program 61 times [2018-10-23 09:44:24,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:24,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:24,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:24,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:24,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:24,788 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:24,789 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:24,789 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 09:44:24,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:24,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:26,852 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 09:44:26,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:26,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-23 09:44:26,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-23 09:44:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-23 09:44:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:44:26,874 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 65 states. [2018-10-23 09:44:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:29,860 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-23 09:44:29,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-23 09:44:29,860 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 68 [2018-10-23 09:44:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:29,861 INFO L225 Difference]: With dead ends: 73 [2018-10-23 09:44:29,861 INFO L226 Difference]: Without dead ends: 70 [2018-10-23 09:44:29,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:44:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-23 09:44:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-23 09:44:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-23 09:44:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-23 09:44:29,865 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-23 09:44:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:29,865 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-23 09:44:29,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-23 09:44:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-23 09:44:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-23 09:44:29,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:29,866 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:29,866 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:29,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2067733173, now seen corresponding path program 62 times [2018-10-23 09:44:29,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:29,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:29,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:29,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:29,875 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:29,875 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:29,875 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 09:44:29,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:44:30,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:44:30,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:30,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:32,275 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 09:44:32,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:32,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-23 09:44:32,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-23 09:44:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-23 09:44:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:44:32,296 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 66 states. [2018-10-23 09:44:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:35,382 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-23 09:44:35,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-23 09:44:35,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 69 [2018-10-23 09:44:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:35,383 INFO L225 Difference]: With dead ends: 74 [2018-10-23 09:44:35,383 INFO L226 Difference]: Without dead ends: 71 [2018-10-23 09:44:35,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:44:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-23 09:44:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-23 09:44:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-23 09:44:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-23 09:44:35,388 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-23 09:44:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:35,388 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-23 09:44:35,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-23 09:44:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-23 09:44:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 09:44:35,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:35,389 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:35,389 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:35,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash 324718603, now seen corresponding path program 63 times [2018-10-23 09:44:35,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:35,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:35,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:35,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:35,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:35,396 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:35,397 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:35,397 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) [2018-10-23 09:44:35,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:44:48,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-23 09:44:48,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:48,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:50,605 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 09:44:50,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:50,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-23 09:44:50,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-23 09:44:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-23 09:44:50,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:44:50,629 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 67 states. [2018-10-23 09:44:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:53,621 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-23 09:44:53,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-23 09:44:53,622 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 70 [2018-10-23 09:44:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:53,623 INFO L225 Difference]: With dead ends: 75 [2018-10-23 09:44:53,623 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 09:44:53,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:44:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 09:44:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-23 09:44:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-23 09:44:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-23 09:44:53,629 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-23 09:44:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:53,630 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-23 09:44:53,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-23 09:44:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-23 09:44:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-23 09:44:53,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:53,631 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:53,631 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:53,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1476279627, now seen corresponding path program 64 times [2018-10-23 09:44:53,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:53,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:53,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:53,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:53,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:53,639 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:44:53,639 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:44:53,639 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 09:44:53,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:44:54,736 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:44:54,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:54,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:57,118 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 09:44:57,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:57,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-23 09:44:57,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-23 09:44:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-23 09:44:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:44:57,140 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 68 states. [2018-10-23 09:45:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:00,211 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-23 09:45:00,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-23 09:45:00,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2018-10-23 09:45:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:00,212 INFO L225 Difference]: With dead ends: 76 [2018-10-23 09:45:00,212 INFO L226 Difference]: Without dead ends: 73 [2018-10-23 09:45:00,213 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 09:45:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-23 09:45:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-23 09:45:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-23 09:45:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-23 09:45:00,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-23 09:45:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:00,217 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-23 09:45:00,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-23 09:45:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-23 09:45:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-23 09:45:00,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:00,217 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:00,218 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:00,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1480034293, now seen corresponding path program 65 times [2018-10-23 09:45:00,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:00,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:00,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:00,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:00,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:00,226 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:00,227 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:00,227 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 09:45:00,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:45:00,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-23 09:45:00,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:00,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:02,654 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 09:45:02,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:02,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-23 09:45:02,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-23 09:45:02,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-23 09:45:02,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-23 09:45:02,675 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 69 states. [2018-10-23 09:45:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:06,747 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-23 09:45:06,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-23 09:45:06,747 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 72 [2018-10-23 09:45:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:06,748 INFO L225 Difference]: With dead ends: 77 [2018-10-23 09:45:06,748 INFO L226 Difference]: Without dead ends: 74 [2018-10-23 09:45:06,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:45:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-23 09:45:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-23 09:45:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 09:45:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-23 09:45:06,754 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-23 09:45:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:06,755 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-23 09:45:06,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-23 09:45:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-23 09:45:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 09:45:06,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:06,756 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:06,756 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:06,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1363514699, now seen corresponding path program 66 times [2018-10-23 09:45:06,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:06,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:06,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:06,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:06,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:06,765 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:06,765 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:06,765 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 09:45:06,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:45:10,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-23 09:45:10,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:10,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:12,829 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 09:45:12,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:12,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-23 09:45:12,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-23 09:45:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-23 09:45:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:45:12,852 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 70 states. [2018-10-23 09:45:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:16,254 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-23 09:45:16,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-23 09:45:16,254 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 73 [2018-10-23 09:45:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:16,255 INFO L225 Difference]: With dead ends: 78 [2018-10-23 09:45:16,255 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 09:45:16,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:45:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 09:45:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-23 09:45:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-23 09:45:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-23 09:45:16,262 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-23 09:45:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:16,262 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-23 09:45:16,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-23 09:45:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-23 09:45:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-23 09:45:16,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:16,263 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:16,264 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:16,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -680779765, now seen corresponding path program 67 times [2018-10-23 09:45:16,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:16,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:16,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:16,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:16,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:16,273 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:16,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:16,273 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 09:45:16,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:45:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:45:16,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:19,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:19,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-23 09:45:19,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-23 09:45:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-23 09:45:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:45:19,078 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 71 states. [2018-10-23 09:45:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:22,715 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-23 09:45:22,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-23 09:45:22,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 74 [2018-10-23 09:45:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:22,717 INFO L225 Difference]: With dead ends: 79 [2018-10-23 09:45:22,717 INFO L226 Difference]: Without dead ends: 76 [2018-10-23 09:45:22,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:45:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-23 09:45:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-23 09:45:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-23 09:45:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-23 09:45:22,724 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-23 09:45:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:22,724 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-23 09:45:22,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-23 09:45:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-23 09:45:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-23 09:45:22,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:22,725 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:22,725 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:22,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash 370601291, now seen corresponding path program 68 times [2018-10-23 09:45:22,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:22,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:22,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:22,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:45:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:22,734 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:22,734 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:22,734 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:22,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:45:22,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:45:22,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:22,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:25,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:25,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-23 09:45:25,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-23 09:45:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-23 09:45:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:45:25,291 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 72 states. [2018-10-23 09:45:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:28,915 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-23 09:45:28,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-23 09:45:28,915 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 75 [2018-10-23 09:45:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:28,916 INFO L225 Difference]: With dead ends: 80 [2018-10-23 09:45:28,916 INFO L226 Difference]: Without dead ends: 77 [2018-10-23 09:45:28,917 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 09:45:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-23 09:45:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-23 09:45:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-23 09:45:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-23 09:45:28,923 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-23 09:45:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:28,923 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-23 09:45:28,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-23 09:45:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-23 09:45:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 09:45:28,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:28,924 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:28,924 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:28,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1396324341, now seen corresponding path program 69 times [2018-10-23 09:45:28,925 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:28,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:28,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:28,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:28,933 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:28,933 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:28,933 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:28,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:45:49,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-23 09:45:49,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:49,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:52,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:52,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-23 09:45:52,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-23 09:45:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-23 09:45:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:45:52,294 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 73 states. [2018-10-23 09:45:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:45:55,874 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-23 09:45:55,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-23 09:45:55,874 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 76 [2018-10-23 09:45:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:45:55,875 INFO L225 Difference]: With dead ends: 81 [2018-10-23 09:45:55,876 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 09:45:55,876 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 09:45:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 09:45:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-23 09:45:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-23 09:45:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-23 09:45:55,881 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-23 09:45:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:45:55,882 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-23 09:45:55,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-23 09:45:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-23 09:45:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-23 09:45:55,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:45:55,882 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:45:55,882 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:45:55,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:45:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash -336444085, now seen corresponding path program 70 times [2018-10-23 09:45:55,883 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:45:55,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:45:55,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:55,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:45:55,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:45:55,891 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:45:55,891 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:45:55,892 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-23 09:45:55,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:45:57,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:45:57,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:45:57,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:45:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:45:59,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:45:59,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-23 09:45:59,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-23 09:45:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-23 09:45:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:45:59,677 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 74 states. [2018-10-23 09:46:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:03,449 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-23 09:46:03,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-23 09:46:03,449 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 77 [2018-10-23 09:46:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:03,450 INFO L225 Difference]: With dead ends: 82 [2018-10-23 09:46:03,450 INFO L226 Difference]: Without dead ends: 79 [2018-10-23 09:46:03,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-10-23 09:46:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-23 09:46:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-23 09:46:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-23 09:46:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-23 09:46:03,455 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-23 09:46:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:03,455 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-23 09:46:03,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-23 09:46:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-23 09:46:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-23 09:46:03,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:03,456 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:03,456 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:03,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1839894517, now seen corresponding path program 71 times [2018-10-23 09:46:03,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:03,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:03,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:03,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:03,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:03,464 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 09:46:03,465 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 09:46:03,465 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:46:03,479 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:46:03,817 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-23 09:46:03,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:03,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-23 09:46:05,230 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 09:46:05,430 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 09:46:05,431 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 09:46:05,436 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 09:46:05,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:46:05 BoogieIcfgContainer [2018-10-23 09:46:05,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:46:05,437 INFO L168 Benchmark]: Toolchain (without parser) took 255240.32 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 858.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -869.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:46:05,439 INFO L168 Benchmark]: CDTParser took 0.23 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 09:46:05,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.19 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 09:46:05,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.95 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 09:46:05,439 INFO L168 Benchmark]: Boogie Preprocessor took 17.44 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 09:46:05,440 INFO L168 Benchmark]: RCFGBuilder took 327.79 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 716.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-10-23 09:46:05,440 INFO L168 Benchmark]: TraceAbstraction took 254584.75 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 142.1 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -100.8 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2018-10-23 09:46:05,443 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.19 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 36.95 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 17.44 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 327.79 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 716.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254584.75 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 142.1 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -100.8 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 44). Cancelled while BasicCegarLoop was analyzing trace of length 79 with TraceHistMax 71,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. TIMEOUT Result, 254.5s OverallTime, 72 OverallIterations, 71 TraceHistogramMax, 99.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 430 SDtfs, 85 SDslu, 10435 SDs, 0 SdLazy, 132417 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2981 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 2698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=71, 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: 0.3s AutomataMinimizationTime, 71 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 68.9s SatisfiabilityAnalysisTime, 80.0s InterpolantComputationTime, 2982 NumberOfCodeBlocks, 2982 NumberOfCodeBlocksAsserted, 713 NumberOfCheckSat, 2911 ConstructedInterpolants, 0 QuantifiedInterpolants, 973185 SizeOfPredicates, 352 NumberOfNonLiveVariables, 13987 ConjunctsInSsa, 10713 ConjunctsInUnsatCore, 71 InterpolantComputations, 1 PerfectInterpolantSequences, 0/59640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown