java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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-df4b876 [2018-11-06 22:54:13,944 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:54:13,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:54:13,959 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:54:13,960 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:54:13,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:54:13,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:54:13,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:54:13,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:54:13,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:54:13,969 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:54:13,969 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:54:13,970 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:54:13,971 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:54:13,972 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:54:13,973 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:54:13,974 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:54:13,975 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:54:13,977 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:54:13,979 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:54:13,980 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:54:13,981 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:54:13,983 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:54:13,983 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:54:13,984 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:54:13,985 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:54:13,985 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:54:13,986 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:54:13,987 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:54:13,988 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:54:13,988 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:54:13,989 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:54:13,991 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:54:14,014 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:54:14,014 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:54:14,015 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:54:14,015 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:54:14,016 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:54:14,016 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:54:14,017 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:54:14,017 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:54:14,017 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:54:14,017 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:54:14,017 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:54:14,018 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:54:14,018 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:54:14,018 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:54:14,018 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:54:14,018 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:54:14,019 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:54:14,020 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:54:14,020 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:54:14,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:54:14,020 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:54:14,020 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:54:14,021 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:54:14,021 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:54:14,021 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:54:14,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:54:14,022 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:54:14,022 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:54:14,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:54:14,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:54:14,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:54:14,099 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:54:14,100 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:54:14,101 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-11-06 22:54:14,170 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f88421b0e/1bf0f5d9bb7345079e056cd22ebdec6e/FLAGc31b4f80c [2018-11-06 22:54:14,598 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:54:14,600 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-11-06 22:54:14,608 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f88421b0e/1bf0f5d9bb7345079e056cd22ebdec6e/FLAGc31b4f80c [2018-11-06 22:54:14,634 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f88421b0e/1bf0f5d9bb7345079e056cd22ebdec6e [2018-11-06 22:54:14,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:54:14,650 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:54:14,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:54:14,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:54:14,656 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:54:14,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:14,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d34f998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14, skipping insertion in model container [2018-11-06 22:54:14,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:14,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:54:14,700 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:54:14,931 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:54:14,937 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:54:14,958 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:54:14,977 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:54:14,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14 WrapperNode [2018-11-06 22:54:14,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:54:14,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:54:14,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:54:14,980 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:54:14,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:14,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:54:15,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:54:15,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:54:15,018 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:54:15,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:15,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:54:15,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:54:15,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:54:15,040 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:54:15,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:54:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:54:15,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:54:15,364 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:54:15,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:15 BoogieIcfgContainer [2018-11-06 22:54:15,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:54:15,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:54:15,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:54:15,373 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:54:15,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:14" (1/3) ... [2018-11-06 22:54:15,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ff5194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:15, skipping insertion in model container [2018-11-06 22:54:15,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:14" (2/3) ... [2018-11-06 22:54:15,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ff5194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:15, skipping insertion in model container [2018-11-06 22:54:15,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:15" (3/3) ... [2018-11-06 22:54:15,378 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call.i.v+cfa-reducer.c [2018-11-06 22:54:15,389 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:54:15,397 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:54:15,415 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:54:15,445 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:54:15,446 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:54:15,446 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:54:15,446 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:54:15,446 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:54:15,446 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:54:15,446 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:54:15,447 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:54:15,447 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:54:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2018-11-06 22:54:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:54:15,467 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:15,468 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:15,470 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:15,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2018-11-06 22:54:15,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:15,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,572 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:15,572 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:15,572 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:15,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:15,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:54:15,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 22:54:15,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:54:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:54:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:54:15,838 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2018-11-06 22:54:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:15,926 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:54:15,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:54:15,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-11-06 22:54:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:15,937 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:54:15,938 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:54:15,941 INFO L604 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 [2018-11-06 22:54:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:54:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:54:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:54:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-11-06 22:54:15,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-11-06 22:54:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:15,977 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-11-06 22:54:15,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:54:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-11-06 22:54:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-06 22:54:15,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:15,978 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:15,978 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:15,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2018-11-06 22:54:15,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:15,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,988 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:15,988 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:15,989 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:16,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:16,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:16,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:16,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-11-06 22:54:16,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:54:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:54:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:54:16,188 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-11-06 22:54:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:16,369 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-11-06 22:54:16,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:54:16,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-11-06 22:54:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:16,370 INFO L225 Difference]: With dead ends: 13 [2018-11-06 22:54:16,370 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:54:16,372 INFO L604 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 [2018-11-06 22:54:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:54:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:54:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:54:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-11-06 22:54:16,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-11-06 22:54:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:16,376 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-11-06 22:54:16,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:54:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-11-06 22:54:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:54:16,377 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:16,377 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:16,377 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:16,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2018-11-06 22:54:16,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:16,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:16,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:16,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:16,390 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:16,390 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:16,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:16,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:16,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:16,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:16,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:16,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-11-06 22:54:16,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:54:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:54:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:54:16,687 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-11-06 22:54:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:16,795 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-11-06 22:54:16,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:54:16,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-11-06 22:54:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:16,796 INFO L225 Difference]: With dead ends: 14 [2018-11-06 22:54:16,796 INFO L226 Difference]: Without dead ends: 11 [2018-11-06 22:54:16,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:54:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-06 22:54:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-06 22:54:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:54:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-11-06 22:54:16,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-11-06 22:54:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:16,801 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-11-06 22:54:16,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:54:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-11-06 22:54:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:54:16,801 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:16,802 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:16,802 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:16,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2018-11-06 22:54:16,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:16,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:16,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:16,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:16,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:16,813 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:16,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:16,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-06 22:54:16,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:16,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:17,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:17,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-11-06 22:54:17,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:54:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:54:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:54:17,062 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-11-06 22:54:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:17,165 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-11-06 22:54:17,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:54:17,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-11-06 22:54:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:17,166 INFO L225 Difference]: With dead ends: 15 [2018-11-06 22:54:17,166 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:54:17,167 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:54:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:54:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:54:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:54:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:54:17,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-06 22:54:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:17,172 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:54:17,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:54:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:54:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:54:17,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:17,173 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:17,173 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:17,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2018-11-06 22:54:17,173 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:17,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:17,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:17,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,183 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:17,183 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:17,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:17,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:17,233 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:17,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:17,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:17,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:17,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-11-06 22:54:17,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:54:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:54:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:54:17,648 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-11-06 22:54:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:17,787 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:54:17,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:54:17,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-11-06 22:54:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:17,789 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:54:17,789 INFO L226 Difference]: Without dead ends: 13 [2018-11-06 22:54:17,790 INFO L604 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 [2018-11-06 22:54:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-06 22:54:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-06 22:54:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-06 22:54:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-06 22:54:17,794 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-11-06 22:54:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:17,795 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-06 22:54:17,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:54:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-06 22:54:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:54:17,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:17,796 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:17,796 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:17,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2018-11-06 22:54:17,796 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:17,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:17,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:17,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,807 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:17,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:17,807 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:17,822 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:17,837 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-06 22:54:17,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:17,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:18,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:18,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-11-06 22:54:18,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:54:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:54:18,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:54:18,074 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-11-06 22:54:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:18,181 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-11-06 22:54:18,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:54:18,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2018-11-06 22:54:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:18,183 INFO L225 Difference]: With dead ends: 17 [2018-11-06 22:54:18,183 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:54:18,184 INFO L604 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 [2018-11-06 22:54:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:54:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:54:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:54:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:54:18,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-06 22:54:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:18,188 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:54:18,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:54:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:54:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:54:18,189 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:18,189 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:18,189 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:18,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2018-11-06 22:54:18,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:18,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,200 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:18,200 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:18,200 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:18,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:18,228 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-11-06 22:54:18,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:18,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:18,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:18,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-11-06 22:54:18,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:54:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:54:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:54:18,406 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-11-06 22:54:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:18,553 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-06 22:54:18,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:54:18,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-11-06 22:54:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:18,554 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:54:18,554 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:54:18,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:54:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:54:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-06 22:54:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:54:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-06 22:54:18,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-06 22:54:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:18,560 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-06 22:54:18,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:54:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-06 22:54:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:54:18,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:18,561 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:18,562 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:18,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2018-11-06 22:54:18,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:18,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:18,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:18,574 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:18,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:18,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:18,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:18,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-11-06 22:54:18,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:54:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:54:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:54:18,848 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-11-06 22:54:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:18,957 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-06 22:54:18,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:54:18,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-11-06 22:54:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:18,959 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:54:18,959 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:54:18,960 INFO L604 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 [2018-11-06 22:54:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:54:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:54:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:54:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-06 22:54:18,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-06 22:54:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:18,965 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-06 22:54:18,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:54:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-06 22:54:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:54:18,966 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:18,966 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:18,966 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:18,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2018-11-06 22:54:18,966 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:18,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,978 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:18,978 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:18,978 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:18,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:19,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:19,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:19,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:19,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:19,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-11-06 22:54:19,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:54:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:54:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:54:19,209 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2018-11-06 22:54:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:19,367 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-06 22:54:19,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:54:19,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-11-06 22:54:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:19,369 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:54:19,369 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:54:19,370 INFO L604 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 [2018-11-06 22:54:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:54:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-06 22:54:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:54:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-06 22:54:19,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-11-06 22:54:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:19,374 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-06 22:54:19,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:54:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-06 22:54:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:54:19,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:19,375 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:19,376 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:19,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2018-11-06 22:54:19,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:19,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:19,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:19,390 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:19,390 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:19,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:19,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-06 22:54:19,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:19,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:19,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:19,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-11-06 22:54:19,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:54:19,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:54:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:54:19,683 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-11-06 22:54:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:19,867 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-06 22:54:19,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:54:19,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-11-06 22:54:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:19,869 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:54:19,869 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:54:19,870 INFO L604 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 [2018-11-06 22:54:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:54:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:54:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:54:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:54:19,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-11-06 22:54:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:19,875 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:54:19,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:54:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:54:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:54:19,875 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:19,876 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:19,876 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:19,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:19,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2018-11-06 22:54:19,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:19,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:19,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,889 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:19,889 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:19,889 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:19,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:19,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:19,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:19,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:20,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:20,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-11-06 22:54:20,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:54:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:54:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:54:20,336 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2018-11-06 22:54:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:20,491 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:54:20,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:54:20,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-11-06 22:54:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:20,492 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:54:20,492 INFO L226 Difference]: Without dead ends: 19 [2018-11-06 22:54:20,492 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:54:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-06 22:54:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-06 22:54:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:54:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-06 22:54:20,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-11-06 22:54:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:20,498 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-06 22:54:20,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:54:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-06 22:54:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:54:20,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:20,499 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:20,499 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:20,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2018-11-06 22:54:20,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:20,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:20,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:20,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:20,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:20,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:20,511 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:20,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:20,546 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-06 22:54:20,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:20,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:21,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:21,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-11-06 22:54:21,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:54:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:54:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:54:21,007 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-11-06 22:54:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:21,264 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-06 22:54:21,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:54:21,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-11-06 22:54:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:21,265 INFO L225 Difference]: With dead ends: 23 [2018-11-06 22:54:21,266 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:54:21,267 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:54:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:54:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-06 22:54:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:54:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:54:21,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-11-06 22:54:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:21,272 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:54:21,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:54:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:54:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:54:21,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:21,273 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:21,273 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:21,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:21,273 INFO L82 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2018-11-06 22:54:21,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:21,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:21,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,285 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:21,285 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:21,285 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:21,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:21,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:54:21,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:21,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:21,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:21,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-11-06 22:54:21,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:54:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:54:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:54:21,624 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2018-11-06 22:54:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:22,435 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-06 22:54:22,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:54:22,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2018-11-06 22:54:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:22,437 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:54:22,437 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:54:22,438 INFO L604 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 [2018-11-06 22:54:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:54:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-06 22:54:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:54:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-06 22:54:22,443 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-11-06 22:54:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:22,444 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-06 22:54:22,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:54:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-06 22:54:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:54:22,444 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:22,445 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:22,445 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:22,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2018-11-06 22:54:22,445 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:22,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:22,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:22,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:22,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:22,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:22,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:22,457 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:22,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:22,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:24,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:24,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-11-06 22:54:24,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:54:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:54:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:54:24,370 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2018-11-06 22:54:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:24,580 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-06 22:54:24,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:54:24,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-11-06 22:54:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:24,581 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:54:24,581 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:54:24,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:54:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:54:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-06 22:54:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:54:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-06 22:54:24,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-11-06 22:54:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:24,588 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-06 22:54:24,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:54:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-06 22:54:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-06 22:54:24,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:24,588 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:24,589 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:24,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2018-11-06 22:54:24,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:24,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:24,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:24,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:24,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:24,604 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:24,604 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:24,604 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:24,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:24,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:24,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:24,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:25,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:25,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-11-06 22:54:25,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:54:25,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:54:25,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:54:25,023 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2018-11-06 22:54:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:25,455 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-06 22:54:25,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:54:25,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-11-06 22:54:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:25,456 INFO L225 Difference]: With dead ends: 26 [2018-11-06 22:54:25,456 INFO L226 Difference]: Without dead ends: 23 [2018-11-06 22:54:25,457 INFO L604 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 [2018-11-06 22:54:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-06 22:54:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-06 22:54:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:54:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-06 22:54:25,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-11-06 22:54:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:25,461 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-06 22:54:25,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:54:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-06 22:54:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:54:25,463 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:25,463 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:25,463 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:25,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2018-11-06 22:54:25,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:25,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:25,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:25,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:25,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:25,485 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:25,485 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:25,485 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:25,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:25,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-06 22:54:25,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:25,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:26,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:26,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-11-06 22:54:26,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:54:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:54:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:54:26,325 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2018-11-06 22:54:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:26,685 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-06 22:54:26,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:54:26,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2018-11-06 22:54:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:26,687 INFO L225 Difference]: With dead ends: 27 [2018-11-06 22:54:26,687 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:54:26,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:54:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:54:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:54:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:54:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-06 22:54:26,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-11-06 22:54:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:26,694 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-06 22:54:26,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:54:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-06 22:54:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:54:26,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:26,695 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:26,695 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:26,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2018-11-06 22:54:26,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:26,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:26,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:26,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:26,706 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:26,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:26,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:26,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:26,865 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:26,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:26,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:27,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:27,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-11-06 22:54:27,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:54:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:54:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:54:27,215 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2018-11-06 22:54:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:27,550 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:54:27,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:54:27,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-11-06 22:54:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:27,552 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:54:27,552 INFO L226 Difference]: Without dead ends: 25 [2018-11-06 22:54:27,553 INFO L604 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 [2018-11-06 22:54:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-06 22:54:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-06 22:54:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:54:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-06 22:54:27,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-11-06 22:54:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:27,557 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-06 22:54:27,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:54:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-06 22:54:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:54:27,558 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:27,558 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:27,558 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:27,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:27,558 INFO L82 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2018-11-06 22:54:27,558 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:27,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:27,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:27,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:27,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:27,569 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:27,569 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:27,570 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:27,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:27,607 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-11-06 22:54:27,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:27,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:27,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:27,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-11-06 22:54:27,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:54:27,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:54:27,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:54:27,956 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2018-11-06 22:54:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:28,299 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-11-06 22:54:28,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:54:28,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2018-11-06 22:54:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:28,301 INFO L225 Difference]: With dead ends: 29 [2018-11-06 22:54:28,301 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:54:28,302 INFO L604 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 [2018-11-06 22:54:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:54:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-06 22:54:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:54:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:54:28,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-11-06 22:54:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:28,306 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:54:28,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:54:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:54:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:54:28,307 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:28,307 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:28,307 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:28,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2018-11-06 22:54:28,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:28,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:28,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:28,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:28,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:28,317 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:28,317 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:28,317 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:28,340 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:28,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-06 22:54:28,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:28,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:28,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:28,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-11-06 22:54:28,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:54:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:54:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:54:28,679 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-11-06 22:54:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:29,017 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-06 22:54:29,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:54:29,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-11-06 22:54:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:29,018 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:54:29,018 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:54:29,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:54:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:54:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-06 22:54:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:54:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-06 22:54:29,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-11-06 22:54:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:29,024 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-06 22:54:29,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:54:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-06 22:54:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:54:29,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:29,025 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:29,025 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:29,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2018-11-06 22:54:29,025 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:29,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:29,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:29,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:29,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:29,034 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:29,034 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:29,035 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:29,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:29,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:29,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:29,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-11-06 22:54:29,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:54:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:54:29,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:54:29,578 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2018-11-06 22:54:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:29,993 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-06 22:54:29,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:54:29,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-11-06 22:54:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:29,994 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:54:29,994 INFO L226 Difference]: Without dead ends: 28 [2018-11-06 22:54:29,995 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:54:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-06 22:54:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-06 22:54:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:54:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-06 22:54:30,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-11-06 22:54:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:30,000 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-06 22:54:30,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:54:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-06 22:54:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:54:30,001 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:30,001 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:30,002 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:30,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2018-11-06 22:54:30,002 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:30,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:30,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:30,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:30,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:30,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:30,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:30,011 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:30,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:30,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:30,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:30,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:30,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:30,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-11-06 22:54:30,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:54:30,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:54:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:54:30,454 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2018-11-06 22:54:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:31,466 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-06 22:54:31,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:54:31,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-11-06 22:54:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:31,467 INFO L225 Difference]: With dead ends: 32 [2018-11-06 22:54:31,468 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:54:31,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:54:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:54:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-06 22:54:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:54:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-06 22:54:31,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-11-06 22:54:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:31,473 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-06 22:54:31,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:54:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-06 22:54:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:54:31,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:31,475 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:31,475 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:31,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2018-11-06 22:54:31,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:31,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:31,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:31,484 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:31,484 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:31,484 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:31,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:31,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-06 22:54:31,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:31,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:32,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:32,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-11-06 22:54:32,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:54:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:54:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:54:32,106 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2018-11-06 22:54:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:32,803 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-06 22:54:32,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:54:32,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2018-11-06 22:54:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:32,807 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:54:32,807 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:54:32,808 INFO L604 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 [2018-11-06 22:54:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:54:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:54:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:54:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:54:32,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-11-06 22:54:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:32,812 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:54:32,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:54:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:54:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:54:32,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:32,813 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:32,813 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:32,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2018-11-06 22:54:32,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:32,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:32,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:32,824 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:32,824 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:32,824 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:32,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:33,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:33,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:33,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:33,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:33,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-11-06 22:54:33,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:54:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:54:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:54:33,641 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2018-11-06 22:54:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:34,062 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:54:34,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:54:34,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2018-11-06 22:54:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:34,063 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:54:34,063 INFO L226 Difference]: Without dead ends: 31 [2018-11-06 22:54:34,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:54:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-06 22:54:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-06 22:54:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:54:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-06 22:54:34,069 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-11-06 22:54:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:34,070 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-06 22:54:34,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:54:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-06 22:54:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:54:34,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:34,070 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:34,071 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:34,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2018-11-06 22:54:34,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:34,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:34,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:34,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,079 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:34,079 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:34,079 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:34,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:34,135 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-06 22:54:34,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:34,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:34,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:34,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-11-06 22:54:34,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:54:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:54:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:54:34,516 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2018-11-06 22:54:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:34,969 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-06 22:54:34,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:54:34,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2018-11-06 22:54:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:34,972 INFO L225 Difference]: With dead ends: 35 [2018-11-06 22:54:34,972 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:54:34,973 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:54:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:54:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-06 22:54:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:54:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:54:34,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-11-06 22:54:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:34,977 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:54:34,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:54:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:54:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:54:34,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:34,978 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:34,978 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:34,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2018-11-06 22:54:34,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:34,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:34,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:34,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,987 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:34,988 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:34,988 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:35,003 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:35,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:54:35,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:35,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:35,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:35,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-11-06 22:54:35,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:54:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:54:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:54:35,666 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2018-11-06 22:54:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:36,258 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-06 22:54:36,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:54:36,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2018-11-06 22:54:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:36,259 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:54:36,259 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:54:36,260 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:54:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:54:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-06 22:54:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:54:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-06 22:54:36,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-11-06 22:54:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:36,265 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-06 22:54:36,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:54:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-06 22:54:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-06 22:54:36,266 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:36,266 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:36,266 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:36,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2018-11-06 22:54:36,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:36,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:36,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:36,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:36,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:36,275 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:36,275 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:36,275 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:36,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:36,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:36,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:36,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-11-06 22:54:36,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:54:36,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:54:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:54:36,870 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2018-11-06 22:54:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:37,429 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-06 22:54:37,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:54:37,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2018-11-06 22:54:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:37,430 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:54:37,430 INFO L226 Difference]: Without dead ends: 34 [2018-11-06 22:54:37,431 INFO L604 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 [2018-11-06 22:54:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-06 22:54:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-06 22:54:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:54:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-06 22:54:37,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-11-06 22:54:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:37,437 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-06 22:54:37,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:54:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-06 22:54:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-06 22:54:37,438 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:37,438 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:37,438 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:37,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2018-11-06 22:54:37,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:37,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:37,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:37,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:37,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:37,447 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:37,447 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:37,447 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:37,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:37,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:37,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:37,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:38,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:38,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-11-06 22:54:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:54:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:54:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:54:38,024 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2018-11-06 22:54:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:38,632 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-06 22:54:38,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:54:38,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2018-11-06 22:54:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:38,634 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:54:38,634 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:54:38,635 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:54:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:54:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-06 22:54:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:54:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-06 22:54:38,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-11-06 22:54:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:38,641 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-06 22:54:38,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:54:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-06 22:54:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:54:38,641 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:38,641 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:38,642 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:38,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2018-11-06 22:54:38,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:38,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:38,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:38,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:38,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:38,650 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:38,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:38,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:38,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:38,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-06 22:54:38,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:38,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:39,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:39,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-11-06 22:54:39,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:54:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:54:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:54:39,717 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2018-11-06 22:54:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:40,425 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-06 22:54:40,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:54:40,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2018-11-06 22:54:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:40,426 INFO L225 Difference]: With dead ends: 39 [2018-11-06 22:54:40,427 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:54:40,428 INFO L604 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 [2018-11-06 22:54:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:54:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:54:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:54:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-06 22:54:40,432 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-11-06 22:54:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:40,433 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-06 22:54:40,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:54:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-06 22:54:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:54:40,434 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:40,434 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:40,434 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:40,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2018-11-06 22:54:40,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:40,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:40,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:40,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:40,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:40,442 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:40,443 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:40,443 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:40,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:40,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:40,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:40,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:41,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:41,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-11-06 22:54:41,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:54:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:54:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:54:41,746 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2018-11-06 22:54:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:42,430 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:54:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:54:42,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2018-11-06 22:54:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:42,431 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:54:42,431 INFO L226 Difference]: Without dead ends: 37 [2018-11-06 22:54:42,431 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:54:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-06 22:54:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-06 22:54:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:54:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-06 22:54:42,436 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-11-06 22:54:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:42,437 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-06 22:54:42,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:54:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-06 22:54:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-06 22:54:42,437 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:42,438 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:42,438 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:42,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2018-11-06 22:54:42,438 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:42,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:42,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:42,446 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:42,446 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:42,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:42,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:42,512 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-11-06 22:54:42,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:42,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:43,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:43,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-11-06 22:54:43,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:54:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:54:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:54:43,079 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2018-11-06 22:54:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:43,781 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-06 22:54:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:54:43,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2018-11-06 22:54:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:43,782 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:54:43,782 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:54:43,783 INFO L604 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 [2018-11-06 22:54:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:54:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-06 22:54:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:54:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:54:43,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-11-06 22:54:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:43,788 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:54:43,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:54:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:54:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:54:43,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:43,789 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:43,789 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:43,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2018-11-06 22:54:43,789 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:43,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:43,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:43,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:43,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:43,796 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:43,796 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:43,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:43,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:43,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-11-06 22:54:43,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:43,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:44,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:44,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-11-06 22:54:44,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:54:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:54:44,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:54:44,518 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2018-11-06 22:54:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:45,300 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-06 22:54:45,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:54:45,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2018-11-06 22:54:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:45,301 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:54:45,301 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:54:45,302 INFO L604 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 [2018-11-06 22:54:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:54:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:54:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:54:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-06 22:54:45,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-11-06 22:54:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:45,307 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-06 22:54:45,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:54:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-06 22:54:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:54:45,308 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:45,308 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:45,308 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:45,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2018-11-06 22:54:45,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:45,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:45,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:45,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:45,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:45,315 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:45,315 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:45,315 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:45,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:45,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:46,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:46,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-11-06 22:54:46,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:54:46,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:54:46,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:54:46,170 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2018-11-06 22:54:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:47,134 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-06 22:54:47,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:54:47,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2018-11-06 22:54:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:47,135 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:54:47,136 INFO L226 Difference]: Without dead ends: 40 [2018-11-06 22:54:47,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:54:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-06 22:54:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-06 22:54:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:54:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-11-06 22:54:47,141 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-11-06 22:54:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:47,141 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-11-06 22:54:47,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:54:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-11-06 22:54:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:54:47,142 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:47,142 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:47,142 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:47,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2018-11-06 22:54:47,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:47,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:47,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:47,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:47,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:47,150 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:47,150 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:47,150 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:47,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:47,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:47,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:47,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:47,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:47,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-11-06 22:54:47,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:54:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:54:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:54:47,880 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2018-11-06 22:54:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:48,831 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-06 22:54:48,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:54:48,832 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2018-11-06 22:54:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:48,832 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:54:48,833 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:54:48,834 INFO L604 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 [2018-11-06 22:54:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:54:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-06 22:54:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:54:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-11-06 22:54:48,839 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-11-06 22:54:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:48,839 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-11-06 22:54:48,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:54:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-11-06 22:54:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:54:48,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:48,840 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:48,841 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:48,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2018-11-06 22:54:48,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:48,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:48,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:48,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,848 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:48,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:48,849 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:48,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:49,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-06 22:54:49,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:49,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:50,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:50,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-11-06 22:54:50,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:54:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:54:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:54:50,584 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2018-11-06 22:54:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:51,584 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-11-06 22:54:51,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:54:51,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2018-11-06 22:54:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:51,586 INFO L225 Difference]: With dead ends: 45 [2018-11-06 22:54:51,586 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:54:51,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:54:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:54:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:54:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:54:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-06 22:54:51,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-11-06 22:54:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:51,592 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-06 22:54:51,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:54:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-06 22:54:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:54:51,592 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:51,592 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:51,592 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:51,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2018-11-06 22:54:51,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:51,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:51,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:51,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:51,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:51,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:51,600 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:54:51,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:52,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:52,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:52,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:54,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:54,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-11-06 22:54:54,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:54:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:54:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:54:54,053 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2018-11-06 22:54:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:54,986 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:54:54,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:54:54,987 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2018-11-06 22:54:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:54,988 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:54:54,988 INFO L226 Difference]: Without dead ends: 43 [2018-11-06 22:54:54,989 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:54:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-06 22:54:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-06 22:54:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:54:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-06 22:54:54,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-11-06 22:54:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:54,993 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-06 22:54:54,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:54:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-06 22:54:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:54:54,994 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:54,994 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:54,994 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:54,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2018-11-06 22:54:54,994 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:54,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:54,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:54,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:54,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:55,002 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:55,002 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:55,002 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:55,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:55,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-11-06 22:54:55,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:55,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:55,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:55,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-11-06 22:54:55,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:54:55,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:54:55,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:54:55,993 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2018-11-06 22:54:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:57,163 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-11-06 22:54:57,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:54:57,163 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2018-11-06 22:54:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:57,164 INFO L225 Difference]: With dead ends: 47 [2018-11-06 22:54:57,164 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:54:57,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:54:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:54:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-11-06 22:54:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:54:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:54:57,169 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-11-06 22:54:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:57,169 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:54:57,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:54:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:54:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:54:57,170 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:57,170 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:57,170 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:57,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2018-11-06 22:54:57,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:57,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:57,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:57,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:57,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:57,178 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:57,178 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:57,178 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:57,195 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:57,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:54:57,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:57,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:58,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:58,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-11-06 22:54:58,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:54:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:54:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:54:58,207 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2018-11-06 22:54:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:59,297 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-11-06 22:54:59,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:54:59,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2018-11-06 22:54:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:59,299 INFO L225 Difference]: With dead ends: 48 [2018-11-06 22:54:59,299 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:54:59,300 INFO L604 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 [2018-11-06 22:54:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:54:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-06 22:54:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:54:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-11-06 22:54:59,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-11-06 22:54:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:59,305 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-11-06 22:54:59,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:54:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-11-06 22:54:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-06 22:54:59,306 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:59,306 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:59,306 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:59,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2018-11-06 22:54:59,306 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:59,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:59,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:59,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:59,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:59,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:59,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:59,314 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:59,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:59,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:00,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:00,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-11-06 22:55:00,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:55:00,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:55:00,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:55:00,207 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2018-11-06 22:55:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:01,296 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-06 22:55:01,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:55:01,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2018-11-06 22:55:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:01,298 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:55:01,298 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:55:01,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:55:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:55:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-06 22:55:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:55:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-11-06 22:55:01,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-11-06 22:55:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:01,303 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-11-06 22:55:01,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:55:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-11-06 22:55:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-06 22:55:01,304 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:01,304 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:01,304 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:01,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2018-11-06 22:55:01,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:01,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:01,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:01,312 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:01,312 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:01,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:01,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:55:01,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:55:01,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:01,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:03,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:03,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-11-06 22:55:03,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:55:03,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:55:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:55:03,451 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2018-11-06 22:55:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:04,606 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-06 22:55:04,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:55:04,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2018-11-06 22:55:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:04,618 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:55:04,618 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:55:04,619 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:55:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:55:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-06 22:55:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:55:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-11-06 22:55:04,623 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-11-06 22:55:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:04,623 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-11-06 22:55:04,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:55:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-11-06 22:55:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:55:04,624 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:04,624 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:04,625 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:04,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2018-11-06 22:55:04,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:04,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:04,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:04,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:04,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:04,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:04,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:04,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:04,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:05,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-06 22:55:05,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:05,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:06,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:06,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-11-06 22:55:06,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:55:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:55:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:55:06,693 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2018-11-06 22:55:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:08,087 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-11-06 22:55:08,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:55:08,088 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2018-11-06 22:55:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:08,089 INFO L225 Difference]: With dead ends: 51 [2018-11-06 22:55:08,089 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:55:08,090 INFO L604 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 [2018-11-06 22:55:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:55:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:55:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:55:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:55:08,094 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-11-06 22:55:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:08,094 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:55:08,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:55:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:55:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:55:08,095 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:08,095 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:08,095 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:08,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2018-11-06 22:55:08,096 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:08,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:08,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:08,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:08,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:08,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:08,103 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:08,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:08,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:08,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:08,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:08,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:09,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:09,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-11-06 22:55:09,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:55:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:55:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:55:09,396 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2018-11-06 22:55:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:10,713 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:55:10,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:55:10,713 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2018-11-06 22:55:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:10,714 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:55:10,714 INFO L226 Difference]: Without dead ends: 49 [2018-11-06 22:55:10,715 INFO L604 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 [2018-11-06 22:55:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-06 22:55:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-06 22:55:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:55:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-06 22:55:10,719 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-11-06 22:55:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:10,720 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-06 22:55:10,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:55:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-06 22:55:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-06 22:55:10,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:10,721 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:10,721 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:10,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2018-11-06 22:55:10,721 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:10,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:10,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:10,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:10,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:10,729 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:10,729 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:10,729 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:10,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:10,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-06 22:55:10,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:10,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:11,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:11,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-11-06 22:55:11,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:55:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:55:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:55:11,810 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2018-11-06 22:55:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:13,369 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-11-06 22:55:13,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:55:13,370 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2018-11-06 22:55:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:13,371 INFO L225 Difference]: With dead ends: 53 [2018-11-06 22:55:13,371 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:55:13,372 INFO L604 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 [2018-11-06 22:55:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:55:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-06 22:55:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:55:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:55:13,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-11-06 22:55:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:13,378 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:55:13,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:55:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:55:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:55:13,378 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:13,378 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:13,379 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:13,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2018-11-06 22:55:13,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:13,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:13,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:13,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:13,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:13,387 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:13,387 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:13,387 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:13,400 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:13,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-11-06 22:55:13,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:13,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:14,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:14,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-11-06 22:55:14,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:55:14,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:55:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:55:14,960 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2018-11-06 22:55:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:16,359 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-06 22:55:16,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:55:16,359 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2018-11-06 22:55:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:16,360 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:55:16,360 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:55:16,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:55:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:55:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-06 22:55:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:55:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-11-06 22:55:16,365 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-11-06 22:55:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:16,365 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-11-06 22:55:16,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:55:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-11-06 22:55:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-06 22:55:16,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:16,366 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:16,366 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:16,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2018-11-06 22:55:16,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:16,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:16,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:16,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:16,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:16,373 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:16,373 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:16,373 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:16,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:16,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:17,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:17,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-11-06 22:55:17,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:55:17,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:55:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:55:17,819 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2018-11-06 22:55:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:19,266 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-11-06 22:55:19,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-06 22:55:19,266 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2018-11-06 22:55:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:19,267 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:55:19,267 INFO L226 Difference]: Without dead ends: 52 [2018-11-06 22:55:19,267 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:55:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-06 22:55:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-06 22:55:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:55:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-11-06 22:55:19,271 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-11-06 22:55:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:19,271 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-11-06 22:55:19,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:55:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-11-06 22:55:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:55:19,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:19,272 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:19,272 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:19,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2018-11-06 22:55:19,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:19,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:19,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:19,280 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:19,281 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:19,281 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:19,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:55:19,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:55:19,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:19,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:20,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:20,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-11-06 22:55:20,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:55:20,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:55:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:55:20,477 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2018-11-06 22:55:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:22,002 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-06 22:55:22,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:55:22,003 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2018-11-06 22:55:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:22,004 INFO L225 Difference]: With dead ends: 56 [2018-11-06 22:55:22,004 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:55:22,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:55:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:55:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-11-06 22:55:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-06 22:55:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-06 22:55:22,008 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-11-06 22:55:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:22,008 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-06 22:55:22,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:55:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-06 22:55:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:55:22,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:22,009 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:22,009 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:22,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2018-11-06 22:55:22,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:22,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:22,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:22,017 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:22,018 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:22,018 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:22,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:24,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-06 22:55:24,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:24,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:25,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:25,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-11-06 22:55:25,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:55:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:55:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:55:25,413 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2018-11-06 22:55:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:26,990 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-11-06 22:55:26,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:55:26,991 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2018-11-06 22:55:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:26,991 INFO L225 Difference]: With dead ends: 57 [2018-11-06 22:55:26,991 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:55:26,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:55:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:55:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:55:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:55:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-06 22:55:26,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-11-06 22:55:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:26,996 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-06 22:55:26,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:55:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-06 22:55:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:55:26,997 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:26,997 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:26,997 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:26,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2018-11-06 22:55:26,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:26,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:26,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:26,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:26,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:27,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:27,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:27,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:27,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:27,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:27,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:27,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:28,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:28,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-11-06 22:55:28,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-06 22:55:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-06 22:55:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:55:28,760 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2018-11-06 22:55:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:30,391 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:55:30,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:55:30,391 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2018-11-06 22:55:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:30,392 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:55:30,392 INFO L226 Difference]: Without dead ends: 55 [2018-11-06 22:55:30,393 INFO L604 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 [2018-11-06 22:55:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-06 22:55:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-06 22:55:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:55:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-06 22:55:30,397 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-11-06 22:55:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:30,398 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-06 22:55:30,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-06 22:55:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-06 22:55:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-06 22:55:30,398 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:30,398 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:30,398 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:30,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2018-11-06 22:55:30,399 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:30,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:30,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:30,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:30,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:30,407 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:30,407 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:30,408 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:30,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:30,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-11-06 22:55:30,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:30,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:31,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:31,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-11-06 22:55:31,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-06 22:55:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-06 22:55:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:55:31,835 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2018-11-06 22:55:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:33,703 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-11-06 22:55:33,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-06 22:55:33,704 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2018-11-06 22:55:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:33,705 INFO L225 Difference]: With dead ends: 59 [2018-11-06 22:55:33,705 INFO L226 Difference]: Without dead ends: 56 [2018-11-06 22:55:33,706 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:55:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-06 22:55:33,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-11-06 22:55:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-06 22:55:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-06 22:55:33,711 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-11-06 22:55:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:33,711 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-06 22:55:33,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-06 22:55:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-06 22:55:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:55:33,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:33,711 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:33,712 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:33,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2018-11-06 22:55:33,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:33,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:33,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:33,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:33,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:33,719 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:33,719 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:33,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:33,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:34,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:55:34,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:34,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:35,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:35,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-11-06 22:55:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-06 22:55:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-06 22:55:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:55:35,561 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2018-11-06 22:55:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:37,325 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-11-06 22:55:37,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:55:37,325 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2018-11-06 22:55:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:37,325 INFO L225 Difference]: With dead ends: 60 [2018-11-06 22:55:37,326 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:55:37,327 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 22:55:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:55:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-06 22:55:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 22:55:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-11-06 22:55:37,338 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-11-06 22:55:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:37,338 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-11-06 22:55:37,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-06 22:55:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-11-06 22:55:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-06 22:55:37,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:37,339 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:37,339 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:37,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2018-11-06 22:55:37,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:37,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:37,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:37,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:37,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:37,348 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:37,348 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:37,348 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:37,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:37,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:39,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:39,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-11-06 22:55:39,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-06 22:55:39,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-06 22:55:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 22:55:39,127 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2018-11-06 22:55:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:40,950 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-11-06 22:55:40,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-06 22:55:40,951 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2018-11-06 22:55:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:40,952 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:55:40,952 INFO L226 Difference]: Without dead ends: 58 [2018-11-06 22:55:40,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:55:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-06 22:55:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-06 22:55:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-06 22:55:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-11-06 22:55:40,958 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-11-06 22:55:40,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:40,958 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-11-06 22:55:40,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-06 22:55:40,958 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-11-06 22:55:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-06 22:55:40,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:40,959 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:40,959 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:40,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2018-11-06 22:55:40,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:40,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:40,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:40,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:40,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:40,967 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:40,967 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:40,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:40,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:55:41,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:55:41,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:41,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:42,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:42,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-11-06 22:55:42,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-06 22:55:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-06 22:55:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:55:42,403 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2018-11-06 22:55:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:44,491 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-11-06 22:55:44,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-06 22:55:44,492 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2018-11-06 22:55:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:44,492 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:55:44,492 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:55:44,493 INFO L604 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 [2018-11-06 22:55:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:55:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-06 22:55:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:55:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-11-06 22:55:44,497 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-11-06 22:55:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:44,497 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-11-06 22:55:44,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-06 22:55:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-11-06 22:55:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:55:44,498 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:44,498 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:44,499 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:44,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:44,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2018-11-06 22:55:44,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:44,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:44,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:44,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:44,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:44,507 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:44,507 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:44,507 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:44,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:48,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-11-06 22:55:48,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:48,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:49,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:49,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-11-06 22:55:49,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-06 22:55:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-06 22:55:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:55:49,697 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2018-11-06 22:55:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:51,736 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-11-06 22:55:51,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 22:55:51,737 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2018-11-06 22:55:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:51,737 INFO L225 Difference]: With dead ends: 63 [2018-11-06 22:55:51,738 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:55:51,738 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:55:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:55:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-06 22:55:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:55:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-11-06 22:55:51,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-11-06 22:55:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:51,743 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-11-06 22:55:51,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-06 22:55:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-11-06 22:55:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:55:51,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:51,743 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:51,743 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:51,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2018-11-06 22:55:51,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:51,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:51,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:51,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:51,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:51,751 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:51,752 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:51,752 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:51,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:52,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:52,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:52,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:53,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:53,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-11-06 22:55:53,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-06 22:55:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-06 22:55:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:55:53,958 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2018-11-06 22:55:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:55,999 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:55:55,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 22:55:55,999 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2018-11-06 22:55:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:56,000 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:55:56,000 INFO L226 Difference]: Without dead ends: 61 [2018-11-06 22:55:56,001 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:55:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-06 22:55:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-06 22:55:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-06 22:55:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-06 22:55:56,005 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-11-06 22:55:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:56,005 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-06 22:55:56,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-06 22:55:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-06 22:55:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-06 22:55:56,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:56,006 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:56,006 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:56,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2018-11-06 22:55:56,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:56,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:56,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:56,014 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:56,014 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:56,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:56,032 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:56,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-11-06 22:55:56,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:56,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:57,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:57,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-11-06 22:55:57,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-06 22:55:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-06 22:55:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:55:57,776 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states. [2018-11-06 22:56:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:00,098 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-11-06 22:56:00,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-06 22:56:00,099 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 60 [2018-11-06 22:56:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:00,100 INFO L225 Difference]: With dead ends: 65 [2018-11-06 22:56:00,100 INFO L226 Difference]: Without dead ends: 62 [2018-11-06 22:56:00,100 INFO L604 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 [2018-11-06 22:56:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-06 22:56:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-11-06 22:56:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-06 22:56:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-11-06 22:56:00,106 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-11-06 22:56:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:00,106 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-11-06 22:56:00,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-06 22:56:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-11-06 22:56:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:56:00,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:00,107 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:00,107 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:00,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:00,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1506835125, now seen corresponding path program 54 times [2018-11-06 22:56:00,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:00,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:00,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:00,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:00,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:00,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:00,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:00,115 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:56:00,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:56:01,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-11-06 22:56:01,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:01,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:02,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:02,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-11-06 22:56:02,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-06 22:56:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-06 22:56:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:56:02,829 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 58 states. [2018-11-06 22:56:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:05,236 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-11-06 22:56:05,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:56:05,236 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 61 [2018-11-06 22:56:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:05,237 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:56:05,237 INFO L226 Difference]: Without dead ends: 63 [2018-11-06 22:56:05,238 INFO L604 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 [2018-11-06 22:56:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-06 22:56:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-06 22:56:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-06 22:56:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-11-06 22:56:05,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-11-06 22:56:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:05,243 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-11-06 22:56:05,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-06 22:56:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-11-06 22:56:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-06 22:56:05,244 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:05,244 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:05,244 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:05,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash 532688907, now seen corresponding path program 55 times [2018-11-06 22:56:05,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:05,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:05,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:05,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:05,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:05,252 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:05,252 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:05,252 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:05,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:05,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:06,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:06,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-11-06 22:56:06,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-06 22:56:06,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-06 22:56:06,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 22:56:06,982 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 59 states. [2018-11-06 22:56:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:09,383 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-11-06 22:56:09,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-06 22:56:09,383 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 62 [2018-11-06 22:56:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:09,384 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:56:09,384 INFO L226 Difference]: Without dead ends: 64 [2018-11-06 22:56:09,385 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:56:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-06 22:56:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-06 22:56:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-06 22:56:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-11-06 22:56:09,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-11-06 22:56:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:09,390 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-11-06 22:56:09,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-06 22:56:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-11-06 22:56:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-06 22:56:09,391 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:09,391 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:09,391 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:09,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash -666575541, now seen corresponding path program 56 times [2018-11-06 22:56:09,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:09,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:09,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:09,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:09,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:09,398 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:09,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:09,399 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:09,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:09,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:09,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:09,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:11,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:11,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-11-06 22:56:11,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-06 22:56:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-06 22:56:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:56:11,306 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 60 states. [2018-11-06 22:56:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:13,836 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-11-06 22:56:13,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 22:56:13,836 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2018-11-06 22:56:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:13,837 INFO L225 Difference]: With dead ends: 68 [2018-11-06 22:56:13,837 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:56:13,838 INFO L604 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 [2018-11-06 22:56:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:56:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-11-06 22:56:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-06 22:56:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-11-06 22:56:13,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-11-06 22:56:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:13,842 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-11-06 22:56:13,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-06 22:56:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-11-06 22:56:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:56:13,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:13,843 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:13,843 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:13,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash 810932235, now seen corresponding path program 57 times [2018-11-06 22:56:13,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:13,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:13,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:13,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:13,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:13,852 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:13,852 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:13,852 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:56:13,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:56:20,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-06 22:56:20,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:20,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:21,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:21,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-11-06 22:56:21,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-06 22:56:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-06 22:56:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-11-06 22:56:21,866 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 61 states. [2018-11-06 22:56:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:24,465 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-11-06 22:56:24,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-06 22:56:24,465 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 64 [2018-11-06 22:56:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:24,466 INFO L225 Difference]: With dead ends: 69 [2018-11-06 22:56:24,466 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:56:24,467 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:56:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:56:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:56:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:56:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-06 22:56:24,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-11-06 22:56:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:24,472 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-06 22:56:24,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-06 22:56:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-06 22:56:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:56:24,472 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:24,472 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:24,472 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:24,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash -630966965, now seen corresponding path program 58 times [2018-11-06 22:56:24,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:24,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:24,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:24,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:24,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:24,481 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:24,481 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:24,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:24,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:56:25,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:56:25,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:25,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:26,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:26,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-11-06 22:56:26,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-06 22:56:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-06 22:56:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:56:26,902 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 62 states. [2018-11-06 22:56:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:29,525 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:56:29,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-06 22:56:29,525 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2018-11-06 22:56:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:29,526 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:56:29,526 INFO L226 Difference]: Without dead ends: 67 [2018-11-06 22:56:29,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:56:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-06 22:56:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-06 22:56:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:56:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-06 22:56:29,532 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-11-06 22:56:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:29,533 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-06 22:56:29,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-06 22:56:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-06 22:56:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-06 22:56:29,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:29,533 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:29,534 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:29,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1914798091, now seen corresponding path program 59 times [2018-11-06 22:56:29,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:29,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:29,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:29,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:29,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:29,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:29,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:29,541 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:29,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:56:29,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-11-06 22:56:29,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:29,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:32,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:32,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-11-06 22:56:32,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-06 22:56:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-06 22:56:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:56:32,267 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 63 states. [2018-11-06 22:56:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:35,069 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-11-06 22:56:35,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-06 22:56:35,069 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 66 [2018-11-06 22:56:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:35,071 INFO L225 Difference]: With dead ends: 71 [2018-11-06 22:56:35,071 INFO L226 Difference]: Without dead ends: 68 [2018-11-06 22:56:35,072 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:56:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-06 22:56:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-06 22:56:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-06 22:56:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-11-06 22:56:35,077 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-11-06 22:56:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:35,077 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-11-06 22:56:35,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-06 22:56:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-11-06 22:56:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:56:35,078 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:35,078 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:35,078 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:35,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:35,078 INFO L82 PathProgramCache]: Analyzing trace with hash -770863797, now seen corresponding path program 60 times [2018-11-06 22:56:35,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:35,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:35,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:35,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,086 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:35,087 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:35,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:35,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:56:36,653 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-06 22:56:36,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:36,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:38,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:38,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-11-06 22:56:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 22:56:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 22:56:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:56:38,495 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 64 states. [2018-11-06 22:56:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:41,348 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-11-06 22:56:41,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-06 22:56:41,349 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2018-11-06 22:56:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:41,350 INFO L225 Difference]: With dead ends: 72 [2018-11-06 22:56:41,350 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:56:41,350 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 22:56:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:56:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-06 22:56:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-06 22:56:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-11-06 22:56:41,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-11-06 22:56:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:41,356 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-11-06 22:56:41,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 22:56:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-11-06 22:56:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-06 22:56:41,356 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:41,357 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:41,357 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:41,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1872963595, now seen corresponding path program 61 times [2018-11-06 22:56:41,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:41,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:41,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:41,366 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:41,367 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:41,367 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:41,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:41,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:43,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:43,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-11-06 22:56:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-11-06 22:56:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-11-06 22:56:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 22:56:43,609 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 65 states. [2018-11-06 22:56:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:46,560 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-11-06 22:56:46,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-06 22:56:46,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 68 [2018-11-06 22:56:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:46,561 INFO L225 Difference]: With dead ends: 73 [2018-11-06 22:56:46,561 INFO L226 Difference]: Without dead ends: 70 [2018-11-06 22:56:46,562 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:56:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-06 22:56:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-11-06 22:56:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-06 22:56:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-11-06 22:56:46,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-11-06 22:56:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:46,566 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-11-06 22:56:46,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-11-06 22:56:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-11-06 22:56:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-06 22:56:46,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:46,566 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:46,567 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:46,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2067733173, now seen corresponding path program 62 times [2018-11-06 22:56:46,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:46,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:46,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:46,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:46,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:46,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:46,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:46,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:46,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:46,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:48,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:48,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-11-06 22:56:48,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-06 22:56:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-06 22:56:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:56:48,913 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 66 states. [2018-11-06 22:56:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:51,933 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-11-06 22:56:51,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-06 22:56:51,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 69 [2018-11-06 22:56:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:51,934 INFO L225 Difference]: With dead ends: 74 [2018-11-06 22:56:51,934 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:56:51,935 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:56:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:56:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-11-06 22:56:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-06 22:56:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-11-06 22:56:51,940 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-11-06 22:56:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:51,940 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-11-06 22:56:51,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-06 22:56:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-11-06 22:56:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:56:51,941 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:51,941 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:51,941 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:51,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 324718603, now seen corresponding path program 63 times [2018-11-06 22:56:51,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:51,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:51,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:51,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:51,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:51,949 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:51,949 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:51,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:56:51,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:02,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-11-06 22:57:02,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:02,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:04,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:04,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-11-06 22:57:04,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-06 22:57:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-06 22:57:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:57:04,235 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 67 states. [2018-11-06 22:57:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:07,368 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-11-06 22:57:07,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-06 22:57:07,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 70 [2018-11-06 22:57:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:07,369 INFO L225 Difference]: With dead ends: 75 [2018-11-06 22:57:07,369 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:57:07,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:57:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:57:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-06 22:57:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-06 22:57:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-11-06 22:57:07,376 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-11-06 22:57:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:07,377 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-11-06 22:57:07,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-06 22:57:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-11-06 22:57:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-06 22:57:07,377 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:07,378 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:07,378 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:07,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1476279627, now seen corresponding path program 64 times [2018-11-06 22:57:07,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:07,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:07,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:07,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:07,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:07,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:07,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:07,386 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:07,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:57:08,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:57:08,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:08,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:10,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:10,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-11-06 22:57:10,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-06 22:57:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-06 22:57:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:57:10,587 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 68 states. [2018-11-06 22:57:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:13,642 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-11-06 22:57:13,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-06 22:57:13,643 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2018-11-06 22:57:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:13,644 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:57:13,644 INFO L226 Difference]: Without dead ends: 73 [2018-11-06 22:57:13,645 INFO L604 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 [2018-11-06 22:57:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-06 22:57:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-06 22:57:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-06 22:57:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-11-06 22:57:13,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-11-06 22:57:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-11-06 22:57:13,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-06 22:57:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-11-06 22:57:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-06 22:57:13,650 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:13,650 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:13,651 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:13,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1480034293, now seen corresponding path program 65 times [2018-11-06 22:57:13,651 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:13,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:13,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:13,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:13,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:13,660 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:13,660 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:13,660 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:13,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:57:14,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-11-06 22:57:14,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:14,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:17,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:17,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-11-06 22:57:17,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-06 22:57:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-06 22:57:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 22:57:17,185 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 69 states. [2018-11-06 22:57:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:20,454 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-11-06 22:57:20,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-06 22:57:20,454 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 72 [2018-11-06 22:57:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:20,455 INFO L225 Difference]: With dead ends: 77 [2018-11-06 22:57:20,456 INFO L226 Difference]: Without dead ends: 74 [2018-11-06 22:57:20,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:57:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-06 22:57:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-06 22:57:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-06 22:57:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-11-06 22:57:20,460 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-11-06 22:57:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:20,460 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-11-06 22:57:20,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-06 22:57:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-11-06 22:57:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:57:20,461 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:20,461 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:20,461 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:20,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1363514699, now seen corresponding path program 66 times [2018-11-06 22:57:20,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:20,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:20,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:20,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:20,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:20,469 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:20,469 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:20,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:20,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:57:23,138 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-11-06 22:57:23,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:23,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:25,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:25,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-11-06 22:57:25,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-06 22:57:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-06 22:57:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:57:25,589 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 70 states. [2018-11-06 22:57:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:28,836 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-11-06 22:57:28,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-06 22:57:28,836 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 73 [2018-11-06 22:57:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:28,837 INFO L225 Difference]: With dead ends: 78 [2018-11-06 22:57:28,838 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:57:28,839 INFO L604 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 [2018-11-06 22:57:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:57:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-06 22:57:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:57:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-11-06 22:57:28,845 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-11-06 22:57:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:28,845 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-11-06 22:57:28,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-06 22:57:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-11-06 22:57:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:57:28,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:28,846 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:28,846 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:28,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -680779765, now seen corresponding path program 67 times [2018-11-06 22:57:28,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:28,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:28,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:28,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:28,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:28,854 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:28,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:28,854 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:28,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:29,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:31,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:31,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-11-06 22:57:31,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-06 22:57:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-06 22:57:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 22:57:31,572 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 71 states. [2018-11-06 22:57:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:34,997 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-11-06 22:57:34,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-06 22:57:34,998 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 74 [2018-11-06 22:57:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:34,999 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:57:34,999 INFO L226 Difference]: Without dead ends: 76 [2018-11-06 22:57:35,000 INFO L604 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 [2018-11-06 22:57:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-06 22:57:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-11-06 22:57:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-06 22:57:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-11-06 22:57:35,006 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-11-06 22:57:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:35,006 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-11-06 22:57:35,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-06 22:57:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-11-06 22:57:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-06 22:57:35,007 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:35,007 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:35,008 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:35,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash 370601291, now seen corresponding path program 68 times [2018-11-06 22:57:35,008 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:35,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:35,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:35,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:35,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:35,017 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:35,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:35,017 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:35,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:57:35,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:57:35,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:35,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:37,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:37,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-11-06 22:57:37,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 22:57:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 22:57:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:57:37,750 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 72 states. [2018-11-06 22:57:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:41,337 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-11-06 22:57:41,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-06 22:57:41,338 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 75 [2018-11-06 22:57:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:41,339 INFO L225 Difference]: With dead ends: 80 [2018-11-06 22:57:41,339 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:57:41,340 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:57:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:57:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-11-06 22:57:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-06 22:57:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-11-06 22:57:41,346 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-11-06 22:57:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:41,347 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-11-06 22:57:41,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 22:57:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-11-06 22:57:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-06 22:57:41,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:41,348 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:41,348 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:41,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1396324341, now seen corresponding path program 69 times [2018-11-06 22:57:41,348 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:41,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:41,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:41,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:41,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:41,357 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:41,358 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:41,358 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:41,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:58,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-11-06 22:57:58,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:58,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:00,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:00,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-11-06 22:58:00,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-06 22:58:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-06 22:58:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:58:00,866 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 73 states. [2018-11-06 22:58:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:04,443 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-11-06 22:58:04,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-06 22:58:04,443 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 76 [2018-11-06 22:58:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:04,444 INFO L225 Difference]: With dead ends: 81 [2018-11-06 22:58:04,444 INFO L226 Difference]: Without dead ends: 78 [2018-11-06 22:58:04,445 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:58:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-06 22:58:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-06 22:58:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-06 22:58:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-11-06 22:58:04,451 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-11-06 22:58:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:04,451 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-11-06 22:58:04,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-06 22:58:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-11-06 22:58:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-06 22:58:04,451 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:04,452 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:04,452 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:04,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash -336444085, now seen corresponding path program 70 times [2018-11-06 22:58:04,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:04,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:04,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:04,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:04,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:04,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:04,469 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:04,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:58:04,478 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:58:05,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:58:05,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:05,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:08,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:08,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-11-06 22:58:08,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-06 22:58:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-06 22:58:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:58:08,287 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 74 states. [2018-11-06 22:58:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:11,933 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-11-06 22:58:11,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-06 22:58:11,933 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 77 [2018-11-06 22:58:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:11,934 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:58:11,934 INFO L226 Difference]: Without dead ends: 79 [2018-11-06 22:58:11,935 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 22:58:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-06 22:58:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-06 22:58:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:58:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-06 22:58:11,941 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-11-06 22:58:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:11,941 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-06 22:58:11,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-06 22:58:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-06 22:58:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:58:11,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:11,942 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:11,942 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:11,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1839894517, now seen corresponding path program 71 times [2018-11-06 22:58:11,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:11,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:11,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:11,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:11,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:11,951 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:11,951 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:11,951 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:58:11,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:58:12,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-11-06 22:58:12,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:12,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:14,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:14,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-11-06 22:58:14,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-06 22:58:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-06 22:58:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 22:58:14,717 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 75 states. [2018-11-06 22:58:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:18,509 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-11-06 22:58:18,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-06 22:58:18,509 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 78 [2018-11-06 22:58:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:18,510 INFO L225 Difference]: With dead ends: 83 [2018-11-06 22:58:18,510 INFO L226 Difference]: Without dead ends: 80 [2018-11-06 22:58:18,510 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:58:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-06 22:58:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-11-06 22:58:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-06 22:58:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-11-06 22:58:18,515 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-11-06 22:58:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:18,516 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-11-06 22:58:18,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-06 22:58:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-11-06 22:58:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-06 22:58:18,516 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:18,516 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:18,517 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:18,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1202217653, now seen corresponding path program 72 times [2018-11-06 22:58:18,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:18,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:18,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:18,525 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:18,525 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:18,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:58:18,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:58:21,938 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-06 22:58:21,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:21,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-11-06 22:58:25,645 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-06 22:58:25,846 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-06 22:58:25,846 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:58:25,851 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:58:25,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:58:25 BoogieIcfgContainer [2018-11-06 22:58:25,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:58:25,852 INFO L168 Benchmark]: Toolchain (without parser) took 251204.02 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 847.2 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -895.0 MB). Peak memory consumption was 760.8 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,854 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-11-06 22:58:25,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.54 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. [2018-11-06 22:58:25,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.22 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. [2018-11-06 22:58:25,855 INFO L168 Benchmark]: Boogie Preprocessor took 21.16 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. [2018-11-06 22:58:25,855 INFO L168 Benchmark]: RCFGBuilder took 325.56 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -753.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,856 INFO L168 Benchmark]: TraceAbstraction took 250485.81 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 132.6 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -152.2 MB). Peak memory consumption was 789.0 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,859 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 327.54 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 39.22 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 21.16 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 325.56 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -753.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250485.81 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 132.6 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -152.2 MB). Peak memory consumption was 789.0 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 80 with TraceHistMax 72,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 69 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. TIMEOUT Result, 250.4s OverallTime, 73 OverallIterations, 72 TraceHistogramMax, 101.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 436 SDtfs, 86 SDslu, 10726 SDs, 0 SdLazy, 137894 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3059 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 2772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=72, 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, 72 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 56.5s SatisfiabilityAnalysisTime, 80.6s InterpolantComputationTime, 3060 NumberOfCodeBlocks, 3060 NumberOfCodeBlocksAsserted, 750 NumberOfCheckSat, 2988 ConstructedInterpolants, 0 QuantifiedInterpolants, 1012917 SizeOfPredicates, 357 NumberOfNonLiveVariables, 14364 ConjunctsInSsa, 11008 ConjunctsInUnsatCore, 72 InterpolantComputations, 1 PerfectInterpolantSequences, 0/62196 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown