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.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:54:13,988 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:54:13,990 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:54:14,004 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:54:14,005 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:54:14,006 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:54:14,007 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:54:14,009 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:54:14,011 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:54:14,011 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:54:14,012 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:54:14,013 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:54:14,014 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:54:14,015 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:54:14,016 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:54:14,017 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:54:14,017 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:54:14,019 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:54:14,022 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:54:14,023 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:54:14,024 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:54:14,026 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:54:14,028 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:54:14,028 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:54:14,029 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:54:14,030 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:54:14,031 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:54:14,031 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:54:14,032 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:54:14,033 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:54:14,034 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:54:14,034 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:54:14,037 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 22:54:14,052 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:54:14,053 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:54:14,054 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:54:14,054 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:54:14,054 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:54:14,055 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:54:14,055 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:54:14,055 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:54:14,055 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:54:14,055 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:54:14,056 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:54:14,056 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:54:14,056 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:54:14,056 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:54:14,056 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:54:14,057 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:54:14,057 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:54:14,057 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:54:14,057 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:54:14,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:54:14,058 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:54:14,058 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:54:14,058 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:54:14,058 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:54:14,058 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:54:14,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:54:14,059 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:54:14,059 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:54:14,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:54:14,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:54:14,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:54:14,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:54:14,125 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:54:14,126 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-11-06 22:54:14,192 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbfb4c82/bb54c6b773ec413394de703e0f30d2d0/FLAGa88e56323 [2018-11-06 22:54:14,657 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:54:14,658 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-11-06 22:54:14,665 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbfb4c82/bb54c6b773ec413394de703e0f30d2d0/FLAGa88e56323 [2018-11-06 22:54:14,679 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bbfb4c82/bb54c6b773ec413394de703e0f30d2d0 [2018-11-06 22:54:14,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:54:14,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:54:14,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:54:14,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:54:14,695 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:54:14,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:14,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38629173 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 22:54:14,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:14" (1/1) ... [2018-11-06 22:54:14,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:54:14,744 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:54:14,977 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:54:14,981 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:54:15,004 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:54:15,016 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:54:15,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15 WrapperNode [2018-11-06 22:54:15,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:54:15,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:54:15,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:54:15,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:54:15,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:54:15,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:54:15,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:54:15,056 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:54:15,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (1/1) ... [2018-11-06 22:54:15,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:54:15,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:54:15,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:54:15,077 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:54:15,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (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 22:54:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:54:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:54:15,498 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:54:15,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:15 BoogieIcfgContainer [2018-11-06 22:54:15,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:54:15,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:54:15,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:54:15,514 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:54:15,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:14" (1/3) ... [2018-11-06 22:54:15,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f9be90 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 22:54:15,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:15" (2/3) ... [2018-11-06 22:54:15,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f9be90 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 22:54:15,520 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 22:54:15,524 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call.i.p+lhb-reducer.c [2018-11-06 22:54:15,538 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:54:15,550 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:54:15,591 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:54:15,632 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:54:15,633 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:54:15,633 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:54:15,633 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:54:15,633 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:54:15,633 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:54:15,634 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:54:15,634 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:54:15,634 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:54:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-11-06 22:54:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:54:15,661 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:15,662 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:15,665 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:15,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1390787819, now seen corresponding path program 1 times [2018-11-06 22:54:15,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:15,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:15,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:15,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:15,775 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:15,775 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:15,775 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 22:54:15,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:15,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:16,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:54:16,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-06 22:54:16,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:54:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:54:16,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:54:16,426 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 9 states. [2018-11-06 22:54:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:16,733 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2018-11-06 22:54:16,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:54:16,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2018-11-06 22:54:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:16,745 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:54:16,745 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:54:16,749 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:54:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:54:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:54:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:54:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:54:16,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-06 22:54:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:16,780 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:54:16,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:54:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:54:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:54:16,781 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:16,781 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:16,781 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:16,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash -164811888, now seen corresponding path program 1 times [2018-11-06 22:54:16,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:16,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:16,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:16,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:16,799 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:16,800 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:16,800 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 22:54:16,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:16,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:17,095 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 22:54:17,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:17,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-11-06 22:54:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:54:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:54:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:54:17,129 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-11-06 22:54:17,631 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 22:54:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:17,654 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-06 22:54:17,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:54:17,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-11-06 22:54:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:17,656 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:54:17,656 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:54:17,657 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:54:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:54:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-06 22:54:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:54:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-06 22:54:17,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-06 22:54:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:17,661 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-06 22:54:17,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:54:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-06 22:54:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:54:17,663 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:17,663 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:17,663 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:17,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -814263691, now seen corresponding path program 2 times [2018-11-06 22:54:17,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:17,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:17,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:17,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:17,677 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:17,677 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:17,677 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 22:54:17,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:17,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:17,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:17,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:17,981 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 22:54:18,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:18,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-11-06 22:54:18,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:54:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:54:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:54:18,004 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-11-06 22:54:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:18,156 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-06 22:54:18,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:54:18,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-11-06 22:54:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:18,163 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:54:18,163 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:54:18,164 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 22:54:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:54:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:54:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:54:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-06 22:54:18,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-06 22:54:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:18,169 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-06 22:54:18,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:54:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-06 22:54:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:54:18,170 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:18,170 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:18,170 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:18,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:18,171 INFO L82 PathProgramCache]: Analyzing trace with hash 527566896, now seen corresponding path program 3 times [2018-11-06 22:54:18,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:18,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:18,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:18,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,184 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:18,184 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:18,185 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 22:54:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:18,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-06 22:54:18,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:18,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:18,453 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 22:54:18,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:18,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-11-06 22:54:18,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:54:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:54:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:54:18,475 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2018-11-06 22:54:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:18,700 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-06 22:54:18,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:54:18,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-11-06 22:54:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:18,702 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:54:18,702 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:54:18,703 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:54:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:54:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-06 22:54:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:54:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-06 22:54:18,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-11-06 22:54:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:18,707 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-06 22:54:18,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:54:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-06 22:54:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:54:18,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:18,708 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:18,708 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:18,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -825357867, now seen corresponding path program 4 times [2018-11-06 22:54:18,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:18,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:18,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:18,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:18,722 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:18,722 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:18,722 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 22:54:18,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:18,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:18,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:18,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:19,009 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 22:54:19,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:19,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-11-06 22:54:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:54:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:54:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:54:19,033 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-11-06 22:54:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:19,230 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-06 22:54:19,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:54:19,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-11-06 22:54:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:19,231 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:54:19,231 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:54:19,232 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 22:54:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:54:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:54:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:54:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:54:19,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-11-06 22:54:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:19,236 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:54:19,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:54:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:54:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:54:19,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:19,237 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:19,237 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:19,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 183647440, now seen corresponding path program 5 times [2018-11-06 22:54:19,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:19,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:19,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:19,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,251 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:19,251 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:19,251 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 22:54:19,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:19,286 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-06 22:54:19,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:19,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:19,554 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 22:54:19,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:19,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-11-06 22:54:19,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:54:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:54:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:54:19,584 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2018-11-06 22:54:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:19,757 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:54:19,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:54:19,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-11-06 22:54:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:19,760 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:54:19,760 INFO L226 Difference]: Without dead ends: 19 [2018-11-06 22:54:19,761 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:54:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-06 22:54:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-06 22:54:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:54:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-06 22:54:19,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-11-06 22:54:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:19,766 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-06 22:54:19,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:54:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-06 22:54:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:54:19,766 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:19,767 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:19,767 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:19,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1398040885, now seen corresponding path program 6 times [2018-11-06 22:54:19,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:19,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:19,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:19,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:19,781 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:19,781 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:19,781 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 22:54:19,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:19,825 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-11-06 22:54:19,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:19,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:20,133 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 22:54:20,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:20,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-11-06 22:54:20,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:54:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:54:20,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:54:20,158 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-11-06 22:54:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:20,350 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-06 22:54:20,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:54:20,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-11-06 22:54:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:20,352 INFO L225 Difference]: With dead ends: 23 [2018-11-06 22:54:20,352 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:54:20,352 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:54:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:54:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-06 22:54:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:54:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:54:20,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-11-06 22:54:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:20,357 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:54:20,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:54:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:54:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:54:20,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:20,358 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:20,358 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:20,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 389532016, now seen corresponding path program 7 times [2018-11-06 22:54:20,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:20,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:20,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:20,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:20,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:20,373 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:20,373 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:20,373 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:54:20,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:20,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:20,853 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 22:54:20,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:20,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-11-06 22:54:20,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:54:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:54:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:54:20,876 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2018-11-06 22:54:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:21,487 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-06 22:54:21,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:54:21,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2018-11-06 22:54:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:21,488 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:54:21,489 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:54:21,489 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:54:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:54:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-06 22:54:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:54:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-06 22:54:21,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-11-06 22:54:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:21,496 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-06 22:54:21,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:54:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-06 22:54:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:54:21,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:21,497 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:21,497 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:21,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -809471851, now seen corresponding path program 8 times [2018-11-06 22:54:21,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:21,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:21,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:21,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,510 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:21,510 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:21,510 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 22:54:21,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:21,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:21,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:21,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:21,978 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 22:54:21,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:21,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-11-06 22:54:22,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:54:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:54:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:54:22,001 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2018-11-06 22:54:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:22,358 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-06 22:54:22,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:54:22,360 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-11-06 22:54:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:22,361 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:54:22,361 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:54:22,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:54:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:54:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-06 22:54:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:54:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-06 22:54:22,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-11-06 22:54:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:22,366 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-06 22:54:22,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:54:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-06 22:54:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-06 22:54:22,367 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:22,367 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:22,368 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:22,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 676113936, now seen corresponding path program 9 times [2018-11-06 22:54:22,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:22,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:22,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:22,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:22,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:22,383 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:22,384 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:22,384 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 22:54:22,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:22,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-06 22:54:22,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:22,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:22,740 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 22:54:22,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:22,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-11-06 22:54:22,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:54:22,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:54:22,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:54:22,762 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2018-11-06 22:54:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:23,009 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-06 22:54:23,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:54:23,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-11-06 22:54:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:23,011 INFO L225 Difference]: With dead ends: 26 [2018-11-06 22:54:23,011 INFO L226 Difference]: Without dead ends: 23 [2018-11-06 22:54:23,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:54:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-06 22:54:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-06 22:54:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:54:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-06 22:54:23,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-11-06 22:54:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:23,018 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-06 22:54:23,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:54:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-06 22:54:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:54:23,019 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:23,019 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:23,020 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:23,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash -515366923, now seen corresponding path program 10 times [2018-11-06 22:54:23,020 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:23,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:23,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:23,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:23,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:23,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:23,033 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:23,033 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 22:54:23,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:23,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:23,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:23,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:25,156 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 22:54:25,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:25,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-11-06 22:54:25,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:54:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:54:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:54:25,179 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2018-11-06 22:54:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:25,553 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-06 22:54:25,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:54:25,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2018-11-06 22:54:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:25,554 INFO L225 Difference]: With dead ends: 27 [2018-11-06 22:54:25,554 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:54:25,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:54:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:54:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:54:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:54:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-06 22:54:25,559 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-11-06 22:54:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:25,559 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-06 22:54:25,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:54:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-06 22:54:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:54:25,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:25,560 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:25,561 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:25,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1203432112, now seen corresponding path program 11 times [2018-11-06 22:54:25,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:25,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:25,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:25,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:25,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:25,576 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:25,576 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:25,576 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 22:54:25,595 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:25,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-06 22:54:25,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:25,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:25,932 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 22:54:25,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:25,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-11-06 22:54:25,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:54:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:54:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:54:25,954 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2018-11-06 22:54:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:26,450 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:54:26,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:54:26,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-11-06 22:54:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:26,451 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:54:26,451 INFO L226 Difference]: Without dead ends: 25 [2018-11-06 22:54:26,452 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 22:54:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-06 22:54:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-06 22:54:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:54:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-06 22:54:26,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-11-06 22:54:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:26,457 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-06 22:54:26,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:54:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-06 22:54:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:54:26,458 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:26,458 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:26,459 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:26,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1348372651, now seen corresponding path program 12 times [2018-11-06 22:54:26,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:26,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:26,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:26,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:26,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:26,471 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:26,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:26,472 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 22:54:26,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:26,545 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:54:26,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:26,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:27,238 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 22:54:27,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:27,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-11-06 22:54:27,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:54:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:54:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:54:27,259 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2018-11-06 22:54:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:27,608 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-11-06 22:54:27,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:54:27,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2018-11-06 22:54:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:27,610 INFO L225 Difference]: With dead ends: 29 [2018-11-06 22:54:27,610 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:54:27,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:54:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:54:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-06 22:54:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:54:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:54:27,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-11-06 22:54:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:27,617 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:54:27,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:54:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:54:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:54:27,618 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:27,618 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:27,619 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:27,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1150058320, now seen corresponding path program 13 times [2018-11-06 22:54:27,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:27,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:27,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:27,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:27,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:27,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:27,630 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:27,630 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 22:54:27,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:27,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:28,068 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 22:54:28,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:28,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-11-06 22:54:28,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:54:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:54:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:54:28,090 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-11-06 22:54:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:28,580 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-06 22:54:28,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:54:28,581 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-11-06 22:54:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:28,581 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:54:28,581 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:54:28,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:54:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:54:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-06 22:54:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:54:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-06 22:54:28,586 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-11-06 22:54:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:28,586 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-06 22:54:28,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:54:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-06 22:54:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:54:28,587 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:28,587 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:28,587 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:28,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1292007093, now seen corresponding path program 14 times [2018-11-06 22:54:28,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:28,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:28,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:28,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:28,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:28,598 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:28,598 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:28,598 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 22:54:28,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:28,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:28,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:28,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:28,974 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 22:54:28,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:28,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-11-06 22:54:28,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:54:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:54:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:54:28,995 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2018-11-06 22:54:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:29,466 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-06 22:54:29,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:54:29,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-11-06 22:54:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:29,470 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:54:29,470 INFO L226 Difference]: Without dead ends: 28 [2018-11-06 22:54:29,471 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:54:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-06 22:54:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-06 22:54:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:54:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-06 22:54:29,475 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-11-06 22:54:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:29,475 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-06 22:54:29,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:54:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-06 22:54:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:54:29,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:29,476 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:29,476 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:29,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1397451760, now seen corresponding path program 15 times [2018-11-06 22:54:29,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:29,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:29,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:29,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:29,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:29,486 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:29,486 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:29,486 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 22:54:29,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:29,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-06 22:54:29,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:29,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:29,906 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 22:54:29,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:29,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-11-06 22:54:29,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:54:29,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:54:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:54:29,937 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2018-11-06 22:54:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:30,825 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-06 22:54:30,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:54:30,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-11-06 22:54:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:30,826 INFO L225 Difference]: With dead ends: 32 [2018-11-06 22:54:30,826 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:54:30,827 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 22:54:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:54:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-06 22:54:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:54:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-06 22:54:30,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-11-06 22:54:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:30,832 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-06 22:54:30,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:54:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-06 22:54:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:54:30,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:30,833 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:30,833 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:30,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash 371269141, now seen corresponding path program 16 times [2018-11-06 22:54:30,833 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:30,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:30,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:30,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:30,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:30,843 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:30,844 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:30,844 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 22:54:30,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:31,032 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:31,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:31,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:31,876 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 22:54:31,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:31,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-11-06 22:54:31,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:54:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:54:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:54:31,897 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2018-11-06 22:54:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:32,574 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-06 22:54:32,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:54:32,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2018-11-06 22:54:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:32,575 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:54:32,575 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:54:32,576 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:54:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:54:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:54:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:54:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:54:32,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-11-06 22:54:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:32,582 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:54:32,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:54:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:54:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:54:32,583 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:32,583 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:32,583 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:32,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1375620976, now seen corresponding path program 17 times [2018-11-06 22:54:32,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:32,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:32,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:32,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:32,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:32,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:32,594 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:32,594 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 22:54:32,621 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:32,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-11-06 22:54:32,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:32,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:33,107 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 22:54:33,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:33,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-11-06 22:54:33,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:54:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:54:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:54:33,129 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2018-11-06 22:54:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:33,647 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:54:33,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:54:33,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2018-11-06 22:54:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:33,649 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:54:33,649 INFO L226 Difference]: Without dead ends: 31 [2018-11-06 22:54:33,650 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:54:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-06 22:54:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-06 22:54:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:54:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-06 22:54:33,655 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-11-06 22:54:33,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:33,655 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-06 22:54:33,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:54:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-06 22:54:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:54:33,656 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:33,656 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:33,656 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:33,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash 305360245, now seen corresponding path program 18 times [2018-11-06 22:54:33,657 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:33,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:33,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:33,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:33,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:33,665 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:33,666 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:33,666 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 22:54:33,684 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:33,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-06 22:54:33,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:33,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:34,439 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 22:54:34,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:34,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-11-06 22:54:34,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:54:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:54:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:54:34,474 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2018-11-06 22:54:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:35,116 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-06 22:54:35,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:54:35,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2018-11-06 22:54:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:35,117 INFO L225 Difference]: With dead ends: 35 [2018-11-06 22:54:35,117 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:54:35,118 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:54:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:54:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-06 22:54:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:54:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:54:35,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-11-06 22:54:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:35,122 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:54:35,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:54:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:54:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:54:35,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:35,123 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:35,123 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:35,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 876170544, now seen corresponding path program 19 times [2018-11-06 22:54:35,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:35,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:35,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:35,132 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:35,133 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:35,133 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 22:54:35,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:35,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:35,631 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 22:54:35,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:35,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-11-06 22:54:35,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:54:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:54:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:54:35,654 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2018-11-06 22:54:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:36,251 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-06 22:54:36,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:54:36,252 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2018-11-06 22:54:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:36,252 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:54:36,252 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:54:36,253 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:54:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:54:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-06 22:54:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:54:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-06 22:54:36,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-11-06 22:54:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:36,258 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-06 22:54:36,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:54:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-06 22:54:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-06 22:54:36,259 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:36,259 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:36,259 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:36,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1391420629, now seen corresponding path program 20 times [2018-11-06 22:54:36,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:36,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:36,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:36,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:36,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:36,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:36,269 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:36,269 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 22:54:36,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:36,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:36,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:36,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:36,883 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 22:54:36,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:36,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-11-06 22:54:36,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:54:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:54:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:54:36,913 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2018-11-06 22:54:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:37,473 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-06 22:54:37,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:54:37,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2018-11-06 22:54:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:37,474 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:54:37,474 INFO L226 Difference]: Without dead ends: 34 [2018-11-06 22:54:37,475 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 22:54:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-06 22:54:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-06 22:54:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:54:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-06 22:54:37,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-11-06 22:54:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:37,480 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-06 22:54:37,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:54:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-06 22:54:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-06 22:54:37,481 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:37,481 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:37,481 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:37,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 184304080, now seen corresponding path program 21 times [2018-11-06 22:54:37,482 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:37,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:37,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:37,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:37,491 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:37,491 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:37,491 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 22:54:37,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:37,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-06 22:54:37,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:37,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:38,128 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 22:54:38,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:38,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-11-06 22:54:38,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:54:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:54:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:54:38,151 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2018-11-06 22:54:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:38,755 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-06 22:54:38,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:54:38,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2018-11-06 22:54:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:38,760 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:54:38,760 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:54:38,760 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:54:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:54:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-06 22:54:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:54:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-06 22:54:38,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-11-06 22:54:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:38,766 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-06 22:54:38,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:54:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-06 22:54:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:54:38,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:38,767 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:38,767 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:38,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:38,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1418396725, now seen corresponding path program 22 times [2018-11-06 22:54:38,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:38,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:38,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:38,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:38,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:38,777 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:38,777 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:38,777 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 22:54:38,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:39,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:39,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:39,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:39,758 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 22:54:39,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:39,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-11-06 22:54:39,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:54:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:54:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:54:39,779 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2018-11-06 22:54:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:40,474 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-06 22:54:40,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:54:40,475 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2018-11-06 22:54:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:40,475 INFO L225 Difference]: With dead ends: 39 [2018-11-06 22:54:40,476 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:54:40,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:54:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:54:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:54:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:54:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-06 22:54:40,482 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-11-06 22:54:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:40,483 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-06 22:54:40,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:54:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-06 22:54:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:54:40,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:40,484 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:40,484 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:40,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1020563056, now seen corresponding path program 23 times [2018-11-06 22:54:40,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:40,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:40,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:40,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:40,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:40,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:40,494 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:40,494 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 22:54:40,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:40,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-06 22:54:40,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:40,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:41,142 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 22:54:41,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:41,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-11-06 22:54:41,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:54:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:54:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:54:41,165 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2018-11-06 22:54:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:41,973 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:54:41,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:54:41,974 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2018-11-06 22:54:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:41,975 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:54:41,975 INFO L226 Difference]: Without dead ends: 37 [2018-11-06 22:54:41,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:54:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-06 22:54:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-06 22:54:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:54:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-06 22:54:41,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-11-06 22:54:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:41,980 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-06 22:54:41,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:54:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-06 22:54:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-06 22:54:41,981 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:41,981 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:41,981 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:41,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1572621205, now seen corresponding path program 24 times [2018-11-06 22:54:41,982 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:41,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:41,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:41,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:41,992 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:41,992 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:41,992 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 22:54:42,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:42,089 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:54:42,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:42,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:42,652 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 22:54:42,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:42,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-11-06 22:54:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:54:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:54:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:54:42,675 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2018-11-06 22:54:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:43,394 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-06 22:54:43,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:54:43,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2018-11-06 22:54:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:43,395 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:54:43,395 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:54:43,396 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 22:54:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:54:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-06 22:54:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:54:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:54:43,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-11-06 22:54:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:43,401 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:54:43,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:54:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:54:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:54:43,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:43,402 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:43,402 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:43,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1506554640, now seen corresponding path program 25 times [2018-11-06 22:54:43,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:43,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:43,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:43,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:43,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:43,410 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:43,411 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:43,411 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 22:54:43,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:43,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:44,156 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 22:54:44,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:44,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-11-06 22:54:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:54:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:54:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:54:44,180 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2018-11-06 22:54:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:44,948 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-06 22:54:44,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:54:44,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2018-11-06 22:54:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:44,949 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:54:44,949 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:54:44,950 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:54:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:54:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:54:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:54:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-06 22:54:44,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-11-06 22:54:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:44,955 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-06 22:54:44,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:54:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-06 22:54:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:54:44,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:44,956 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:44,956 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:44,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash -541508875, now seen corresponding path program 26 times [2018-11-06 22:54:44,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:44,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:44,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:44,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:44,964 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:44,965 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:44,965 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 22:54:44,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:45,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:45,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:45,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:45,830 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 22:54:45,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:45,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-11-06 22:54:45,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:54:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:54:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:54:45,852 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2018-11-06 22:54:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:46,837 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-06 22:54:46,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:54:46,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2018-11-06 22:54:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:46,838 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:54:46,839 INFO L226 Difference]: Without dead ends: 40 [2018-11-06 22:54:46,840 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 22:54:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-06 22:54:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-06 22:54:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:54:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-11-06 22:54:46,844 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-11-06 22:54:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:46,845 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-11-06 22:54:46,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:54:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-11-06 22:54:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:54:46,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:46,845 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:46,845 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:46,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash 393031600, now seen corresponding path program 27 times [2018-11-06 22:54:46,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:46,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:46,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:46,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:46,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:46,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:46,852 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:46,852 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:54:46,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:47,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-06 22:54:47,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:47,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:47,889 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 22:54:47,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:47,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-11-06 22:54:47,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:54:47,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:54:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:54:47,911 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2018-11-06 22:54:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:48,821 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-06 22:54:48,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:54:48,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2018-11-06 22:54:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:48,822 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:54:48,822 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:54:48,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:54:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:54:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-06 22:54:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:54:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-11-06 22:54:48,827 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-11-06 22:54:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:48,828 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-11-06 22:54:48,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:54:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-11-06 22:54:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:54:48,828 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:48,828 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:48,829 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:48,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash -700984747, now seen corresponding path program 28 times [2018-11-06 22:54:48,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:48,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:48,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:48,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,842 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:48,842 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:48,842 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 22:54:48,863 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:49,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:49,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:49,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:50,647 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 22:54:50,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:50,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-11-06 22:54:50,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:54:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:54:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:54:50,669 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2018-11-06 22:54:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:51,698 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-11-06 22:54:51,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:54:51,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2018-11-06 22:54:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:51,700 INFO L225 Difference]: With dead ends: 45 [2018-11-06 22:54:51,700 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:54:51,701 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:54:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:54:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:54:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:54:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-06 22:54:51,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-11-06 22:54:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:51,706 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-06 22:54:51,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:54:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-06 22:54:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:54:51,706 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:51,706 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:51,707 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:51,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -255753136, now seen corresponding path program 29 times [2018-11-06 22:54:51,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:51,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:51,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:51,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:51,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:51,715 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:51,715 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:51,715 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 22:54:51,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:51,783 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-11-06 22:54:51,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:51,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:52,555 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 22:54:52,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:52,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-11-06 22:54:52,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:54:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:54:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:54:52,578 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2018-11-06 22:54:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:53,544 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:54:53,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:54:53,544 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2018-11-06 22:54:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:53,545 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:54:53,545 INFO L226 Difference]: Without dead ends: 43 [2018-11-06 22:54:53,547 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:54:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-06 22:54:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-06 22:54:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:54:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-06 22:54:53,550 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-11-06 22:54:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:53,551 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-06 22:54:53,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:54:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-06 22:54:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:54:53,551 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:53,551 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:53,552 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:53,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash 661524917, now seen corresponding path program 30 times [2018-11-06 22:54:53,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:53,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:53,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:53,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:53,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:53,559 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:53,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:53,560 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 22:54:53,570 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:53,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-11-06 22:54:53,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:53,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:54,996 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 22:54:55,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:55,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-11-06 22:54:55,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:54:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:54:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:54:55,018 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2018-11-06 22:54:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:56,115 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-11-06 22:54:56,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:54:56,116 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2018-11-06 22:54:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:56,117 INFO L225 Difference]: With dead ends: 47 [2018-11-06 22:54:56,117 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:54:56,119 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:54:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:54:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-11-06 22:54:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:54:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:54:56,124 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-11-06 22:54:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:56,124 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:54:56,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:54:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:54:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:54:56,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:56,125 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:56,125 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:56,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -967626512, now seen corresponding path program 31 times [2018-11-06 22:54:56,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:56,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:56,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:56,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:56,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:56,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:56,135 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:56,135 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 22:54:56,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:56,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:57,368 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 22:54:57,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:54:57,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-11-06 22:54:57,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:54:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:54:57,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:54:57,390 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2018-11-06 22:54:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:58,453 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-11-06 22:54:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:54:58,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2018-11-06 22:54:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:58,455 INFO L225 Difference]: With dead ends: 48 [2018-11-06 22:54:58,455 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:54:58,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:54:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:54:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-06 22:54:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:54:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-11-06 22:54:58,460 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-11-06 22:54:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:58,461 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-11-06 22:54:58,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:54:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-11-06 22:54:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-06 22:54:58,461 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:58,461 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:58,462 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:58,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash 68286741, now seen corresponding path program 32 times [2018-11-06 22:54:58,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:58,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:58,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:58,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:58,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:58,474 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:54:58,474 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:54:58,474 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 22:54:58,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:58,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:58,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:58,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:00,461 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 22:55:00,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:00,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-11-06 22:55:00,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:55:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:55:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:55:00,484 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2018-11-06 22:55:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:01,654 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-06 22:55:01,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:55:01,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2018-11-06 22:55:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:01,655 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:55:01,656 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:55:01,657 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:55:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:55:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-06 22:55:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:55:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-11-06 22:55:01,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-11-06 22:55:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:01,662 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-11-06 22:55:01,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:55:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-11-06 22:55:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-06 22:55:01,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:01,663 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:01,663 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:01,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2116826512, now seen corresponding path program 33 times [2018-11-06 22:55:01,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:01,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:01,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:01,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:01,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:01,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:01,671 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:01,671 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 22:55:01,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:02,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-06 22:55:02,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:02,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:03,444 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 22:55:03,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:03,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-11-06 22:55:03,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:55:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:55:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:55:03,466 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2018-11-06 22:55:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:04,634 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-06 22:55:04,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:55:04,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2018-11-06 22:55:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:04,635 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:55:04,635 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:55:04,636 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:55:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:55:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-06 22:55:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:55:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-11-06 22:55:04,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-11-06 22:55:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:04,640 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-11-06 22:55:04,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:55:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-11-06 22:55:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:55:04,641 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:04,641 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:04,641 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:04,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:04,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1197049973, now seen corresponding path program 34 times [2018-11-06 22:55:04,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:04,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:04,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:04,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:04,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:04,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:04,649 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:04,649 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 22:55:04,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:05,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:05,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:05,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:06,025 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 22:55:06,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:06,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-11-06 22:55:06,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:55:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:55:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:55:06,047 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2018-11-06 22:55:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:07,455 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-11-06 22:55:07,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:55:07,455 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2018-11-06 22:55:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:07,456 INFO L225 Difference]: With dead ends: 51 [2018-11-06 22:55:07,456 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:55:07,458 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:55:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:55:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:55:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:55:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:55:07,462 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-11-06 22:55:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:55:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:55:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:55:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:55:07,463 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:07,464 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:07,464 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:07,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1546218960, now seen corresponding path program 35 times [2018-11-06 22:55:07,464 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:07,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:07,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:07,472 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:07,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:07,472 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 22:55:07,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:07,587 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-11-06 22:55:07,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:07,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:09,208 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 22:55:09,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:09,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-11-06 22:55:09,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:55:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:55:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:55:09,230 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2018-11-06 22:55:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:10,555 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:55:10,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:55:10,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2018-11-06 22:55:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:10,556 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:55:10,556 INFO L226 Difference]: Without dead ends: 49 [2018-11-06 22:55:10,557 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:55:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-06 22:55:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-06 22:55:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:55:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-06 22:55:10,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-11-06 22:55:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:10,562 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-06 22:55:10,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:55:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-06 22:55:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-06 22:55:10,562 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:10,563 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:10,563 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:10,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:10,563 INFO L82 PathProgramCache]: Analyzing trace with hash -688209963, now seen corresponding path program 36 times [2018-11-06 22:55:10,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:10,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:10,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:10,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:10,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:10,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:10,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:10,571 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 22:55:10,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:11,038 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:55:11,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:11,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:12,105 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 22:55:12,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:12,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-11-06 22:55:12,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:55:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:55:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:55:12,127 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2018-11-06 22:55:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:13,604 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-11-06 22:55:13,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:55:13,605 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2018-11-06 22:55:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:13,606 INFO L225 Difference]: With dead ends: 53 [2018-11-06 22:55:13,606 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:55:13,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:55:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:55:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-06 22:55:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:55:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:55:13,612 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-11-06 22:55:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:13,612 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:55:13,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:55:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:55:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:55:13,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:13,613 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:13,613 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:13,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 140265168, now seen corresponding path program 37 times [2018-11-06 22:55:13,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:13,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:13,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:13,621 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:13,622 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:13,622 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 22:55:13,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:13,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:14,770 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 22:55:14,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:14,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-11-06 22:55:14,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:55:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:55:14,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:55:14,791 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2018-11-06 22:55:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:16,119 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-06 22:55:16,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:55:16,119 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2018-11-06 22:55:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:16,120 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:55:16,120 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:55:16,121 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 22:55:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:55:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-06 22:55:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:55:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-11-06 22:55:16,125 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-11-06 22:55:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:16,125 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-11-06 22:55:16,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:55:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-11-06 22:55:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-06 22:55:16,126 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:16,126 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:16,126 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:16,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash 53190453, now seen corresponding path program 38 times [2018-11-06 22:55:16,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:16,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:16,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:16,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:16,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:16,134 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:16,134 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:16,134 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 22:55:16,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:55:16,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:55:16,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:16,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:17,551 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 22:55:17,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:17,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-11-06 22:55:17,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:55:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:55:17,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:55:17,572 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2018-11-06 22:55:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:19,031 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-11-06 22:55:19,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-06 22:55:19,031 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2018-11-06 22:55:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:19,032 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:55:19,032 INFO L226 Difference]: Without dead ends: 52 [2018-11-06 22:55:19,032 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 22:55:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-06 22:55:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-06 22:55:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:55:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-11-06 22:55:19,037 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-11-06 22:55:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:19,037 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-11-06 22:55:19,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:55:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-11-06 22:55:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:55:19,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:19,038 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:19,038 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:19,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:19,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1648841584, now seen corresponding path program 39 times [2018-11-06 22:55:19,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:19,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:19,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:19,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:19,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:19,046 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:19,046 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:19,046 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 22:55:19,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:20,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-06 22:55:20,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:20,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:21,440 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 22:55:21,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:21,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-11-06 22:55:21,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:55:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:55:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:55:21,460 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2018-11-06 22:55:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:23,139 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-06 22:55:23,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:55:23,140 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2018-11-06 22:55:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:23,141 INFO L225 Difference]: With dead ends: 56 [2018-11-06 22:55:23,141 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:55:23,142 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 22:55:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:55:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-11-06 22:55:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-06 22:55:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-06 22:55:23,146 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-11-06 22:55:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:23,146 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-06 22:55:23,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:55:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-06 22:55:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:55:23,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:23,147 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:23,147 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:23,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -425580907, now seen corresponding path program 40 times [2018-11-06 22:55:23,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:23,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:23,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:23,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:23,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:23,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:23,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:23,156 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 22:55:23,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:23,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:23,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:23,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:24,912 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 22:55:24,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:24,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-11-06 22:55:24,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:55:24,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:55:24,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:55:24,934 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2018-11-06 22:55:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:26,526 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-11-06 22:55:26,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:55:26,526 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2018-11-06 22:55:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:26,527 INFO L225 Difference]: With dead ends: 57 [2018-11-06 22:55:26,527 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:55:26,528 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 22:55:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:55:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:55:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:55:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-06 22:55:26,533 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-11-06 22:55:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:26,533 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-06 22:55:26,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:55:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-06 22:55:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:55:26,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:26,534 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:26,534 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:26,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -308168688, now seen corresponding path program 41 times [2018-11-06 22:55:26,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:26,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:26,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:26,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:26,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:26,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:26,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:26,541 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:55:26,559 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:26,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-06 22:55:26,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:26,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:28,316 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 22:55:28,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:28,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-11-06 22:55:28,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-06 22:55:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-06 22:55:28,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:55:28,337 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2018-11-06 22:55:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:29,960 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:55:29,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:55:29,961 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2018-11-06 22:55:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:29,962 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:55:29,962 INFO L226 Difference]: Without dead ends: 55 [2018-11-06 22:55:29,962 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:55:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-06 22:55:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-06 22:55:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:55:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-06 22:55:29,966 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-11-06 22:55:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:29,966 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-06 22:55:29,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-06 22:55:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-06 22:55:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-06 22:55:29,966 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:29,966 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:29,967 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:29,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash -963357195, now seen corresponding path program 42 times [2018-11-06 22:55:29,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:29,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:29,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:29,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:29,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:29,975 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:29,975 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:29,975 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 22:55:29,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:30,801 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-11-06 22:55:30,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:30,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:32,080 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 22:55:32,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:32,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-11-06 22:55:32,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-06 22:55:32,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-06 22:55:32,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:55:32,102 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2018-11-06 22:55:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:34,008 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-11-06 22:55:34,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-06 22:55:34,009 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2018-11-06 22:55:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:34,009 INFO L225 Difference]: With dead ends: 59 [2018-11-06 22:55:34,010 INFO L226 Difference]: Without dead ends: 56 [2018-11-06 22:55:34,010 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 22:55:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-06 22:55:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-11-06 22:55:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-06 22:55:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-06 22:55:34,015 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-11-06 22:55:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:34,016 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-06 22:55:34,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-06 22:55:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-06 22:55:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:55:34,016 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:34,016 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:34,016 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:34,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash 200635568, now seen corresponding path program 43 times [2018-11-06 22:55:34,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:34,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:34,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:34,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:34,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:34,024 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:34,025 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:34,025 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 22:55:34,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:34,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:35,845 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 22:55:35,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:35,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-11-06 22:55:35,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-06 22:55:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-06 22:55:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:55:35,866 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2018-11-06 22:55:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:37,751 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-11-06 22:55:37,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:55:37,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2018-11-06 22:55:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:37,753 INFO L225 Difference]: With dead ends: 60 [2018-11-06 22:55:37,753 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:55:37,754 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 22:55:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:55:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-06 22:55:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 22:55:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-11-06 22:55:37,758 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-11-06 22:55:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:37,758 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-11-06 22:55:37,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-06 22:55:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-11-06 22:55:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-06 22:55:37,758 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:37,759 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:37,759 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:37,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1924672853, now seen corresponding path program 44 times [2018-11-06 22:55:37,759 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:37,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:37,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:37,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:55:37,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:37,767 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:37,767 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:37,767 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 22:55:37,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:55:37,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:55:37,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:37,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:39,302 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 22:55:39,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:39,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-11-06 22:55:39,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-06 22:55:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-06 22:55:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 22:55:39,323 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2018-11-06 22:55:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:41,277 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-11-06 22:55:41,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-06 22:55:41,277 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2018-11-06 22:55:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:41,278 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:55:41,278 INFO L226 Difference]: Without dead ends: 58 [2018-11-06 22:55:41,279 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:55:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-06 22:55:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-06 22:55:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-06 22:55:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-11-06 22:55:41,285 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-11-06 22:55:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:41,285 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-11-06 22:55:41,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-06 22:55:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-11-06 22:55:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-06 22:55:41,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:41,286 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:41,286 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:41,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash -464746160, now seen corresponding path program 45 times [2018-11-06 22:55:41,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:41,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:41,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:41,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:41,294 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:41,294 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:41,294 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 22:55:41,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:55:45,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-06 22:55:45,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:45,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:46,363 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 22:55:46,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:46,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-11-06 22:55:46,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-06 22:55:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-06 22:55:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:55:46,385 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2018-11-06 22:55:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:48,490 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-11-06 22:55:48,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-06 22:55:48,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2018-11-06 22:55:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:48,491 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:55:48,492 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:55:48,492 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 22:55:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:55:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-06 22:55:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:55:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-11-06 22:55:48,497 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-11-06 22:55:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:48,497 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-11-06 22:55:48,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-06 22:55:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-11-06 22:55:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:55:48,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:48,497 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:48,498 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:48,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1522291531, now seen corresponding path program 46 times [2018-11-06 22:55:48,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:48,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:48,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:48,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:48,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:48,505 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:48,505 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:48,506 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 22:55:48,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:49,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:49,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:49,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:50,512 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 22:55:50,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:50,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-11-06 22:55:50,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-06 22:55:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-06 22:55:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:55:50,534 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2018-11-06 22:55:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:52,603 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-11-06 22:55:52,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 22:55:52,603 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2018-11-06 22:55:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:52,604 INFO L225 Difference]: With dead ends: 63 [2018-11-06 22:55:52,604 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:55:52,605 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:55:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:55:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-06 22:55:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:55:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-11-06 22:55:52,609 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-11-06 22:55:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:52,610 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-11-06 22:55:52,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-06 22:55:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-11-06 22:55:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:55:52,610 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:52,610 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:52,610 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:52,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:52,611 INFO L82 PathProgramCache]: Analyzing trace with hash 53540336, now seen corresponding path program 47 times [2018-11-06 22:55:52,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:52,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:52,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:52,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:52,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:52,617 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:52,617 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:52,617 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 22:55:52,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:52,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-11-06 22:55:52,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:52,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:54,606 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 22:55:54,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:54,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-11-06 22:55:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-06 22:55:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-06 22:55:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:55:54,627 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2018-11-06 22:55:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:56,725 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:55:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 22:55:56,726 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2018-11-06 22:55:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:56,726 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:55:56,727 INFO L226 Difference]: Without dead ends: 61 [2018-11-06 22:55:56,727 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:55:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-06 22:55:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-06 22:55:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-06 22:55:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-06 22:55:56,733 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-11-06 22:55:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-06 22:55:56,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-06 22:55:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-06 22:55:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-06 22:55:56,733 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:56,733 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:56,734 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:56,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1659687957, now seen corresponding path program 48 times [2018-11-06 22:55:56,734 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:56,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:56,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:56,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:56,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:56,740 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:55:56,741 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:55:56,741 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 22:55:56,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:57,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:55:57,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:57,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:59,754 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 22:55:59,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:55:59,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-11-06 22:55:59,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-06 22:55:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-06 22:55:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:55:59,775 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states. [2018-11-06 22:56:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:01,927 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-11-06 22:56:01,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-06 22:56:01,928 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 60 [2018-11-06 22:56:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:01,929 INFO L225 Difference]: With dead ends: 65 [2018-11-06 22:56:01,929 INFO L226 Difference]: Without dead ends: 62 [2018-11-06 22:56:01,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:56:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-06 22:56:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-11-06 22:56:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-06 22:56:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-11-06 22:56:01,934 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-11-06 22:56:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:01,935 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-11-06 22:56:01,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-06 22:56:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-11-06 22:56:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:56:01,935 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:01,936 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:01,936 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:01,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash -89343344, now seen corresponding path program 49 times [2018-11-06 22:56:01,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:01,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:01,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:01,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:01,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:01,942 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:01,942 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:01,943 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 22:56:01,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:02,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:03,994 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 22:56:04,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:04,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-11-06 22:56:04,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-06 22:56:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-06 22:56:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:56:04,014 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 58 states. [2018-11-06 22:56:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:06,209 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-11-06 22:56:06,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:56:06,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 61 [2018-11-06 22:56:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:06,210 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:56:06,210 INFO L226 Difference]: Without dead ends: 63 [2018-11-06 22:56:06,211 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 22:56:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-06 22:56:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-06 22:56:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-06 22:56:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-11-06 22:56:06,216 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-11-06 22:56:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:06,216 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-11-06 22:56:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-06 22:56:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-11-06 22:56:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-06 22:56:06,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:06,217 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:06,217 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:06,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1525261173, now seen corresponding path program 50 times [2018-11-06 22:56:06,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:06,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:06,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:06,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:06,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:06,225 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:06,225 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:06,225 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 22:56:06,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:06,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:06,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:06,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:07,942 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 22:56:07,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:07,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-11-06 22:56:07,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-06 22:56:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-06 22:56:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 22:56:07,963 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 59 states. [2018-11-06 22:56:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:10,385 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-11-06 22:56:10,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-06 22:56:10,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 62 [2018-11-06 22:56:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:10,386 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:56:10,387 INFO L226 Difference]: Without dead ends: 64 [2018-11-06 22:56:10,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:56:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-06 22:56:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-06 22:56:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-06 22:56:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-11-06 22:56:10,391 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-11-06 22:56:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:10,391 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-11-06 22:56:10,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-06 22:56:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-11-06 22:56:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-06 22:56:10,392 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:10,392 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:10,392 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:10,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash 38393648, now seen corresponding path program 51 times [2018-11-06 22:56:10,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:10,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:10,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:10,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:10,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:10,401 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:10,401 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:10,401 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 22:56:10,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:56:16,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-11-06 22:56:16,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:16,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:18,550 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 22:56:18,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:18,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-11-06 22:56:18,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-06 22:56:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-06 22:56:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:56:18,571 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 60 states. [2018-11-06 22:56:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:21,003 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-11-06 22:56:21,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 22:56:21,004 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2018-11-06 22:56:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:21,005 INFO L225 Difference]: With dead ends: 68 [2018-11-06 22:56:21,005 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:56:21,005 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 22:56:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:56:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-11-06 22:56:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-06 22:56:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-11-06 22:56:21,011 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-11-06 22:56:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:21,011 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-11-06 22:56:21,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-06 22:56:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-11-06 22:56:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:56:21,012 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:21,012 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:21,012 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:21,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1190140629, now seen corresponding path program 52 times [2018-11-06 22:56:21,013 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:21,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:21,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:21,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:21,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:21,020 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:21,020 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:21,021 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 22:56:21,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:56:21,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:56:21,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:21,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:23,361 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 22:56:23,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:23,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-11-06 22:56:23,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-06 22:56:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-06 22:56:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-11-06 22:56:23,382 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 61 states. [2018-11-06 22:56:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:25,790 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-11-06 22:56:25,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-06 22:56:25,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 64 [2018-11-06 22:56:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:25,792 INFO L225 Difference]: With dead ends: 69 [2018-11-06 22:56:25,792 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:56:25,792 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:56:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:56:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:56:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:56:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-06 22:56:25,797 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-11-06 22:56:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:25,797 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-06 22:56:25,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-06 22:56:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-06 22:56:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:56:25,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:25,798 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:25,798 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:25,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1760408624, now seen corresponding path program 53 times [2018-11-06 22:56:25,798 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:25,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:25,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:25,806 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:25,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:25,807 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:56:25,822 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:56:25,986 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-11-06 22:56:25,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:25,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:27,644 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 22:56:27,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:27,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-11-06 22:56:27,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-06 22:56:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-06 22:56:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:56:27,665 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 62 states. [2018-11-06 22:56:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:30,263 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:56:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-06 22:56:30,263 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2018-11-06 22:56:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:30,264 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:56:30,264 INFO L226 Difference]: Without dead ends: 67 [2018-11-06 22:56:30,265 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:56:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-06 22:56:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-06 22:56:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:56:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-06 22:56:30,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-11-06 22:56:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:30,269 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-06 22:56:30,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-06 22:56:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-06 22:56:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-06 22:56:30,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:30,269 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:30,269 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:30,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1261845045, now seen corresponding path program 54 times [2018-11-06 22:56:30,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:30,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:30,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:30,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:30,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:30,284 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:30,284 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:30,284 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 22:56:30,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:56:32,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-11-06 22:56:32,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:32,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:35,043 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 22:56:35,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:35,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-11-06 22:56:35,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-06 22:56:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-06 22:56:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:56:35,065 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 63 states. [2018-11-06 22:56:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:37,501 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-11-06 22:56:37,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-06 22:56:37,502 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 66 [2018-11-06 22:56:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:37,503 INFO L225 Difference]: With dead ends: 71 [2018-11-06 22:56:37,503 INFO L226 Difference]: Without dead ends: 68 [2018-11-06 22:56:37,504 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:56:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-06 22:56:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-06 22:56:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-06 22:56:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-11-06 22:56:37,509 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-11-06 22:56:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:37,509 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-11-06 22:56:37,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-06 22:56:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-11-06 22:56:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:56:37,510 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:37,510 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:37,510 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:37,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash 462428272, now seen corresponding path program 55 times [2018-11-06 22:56:37,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:37,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:37,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:37,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:37,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:37,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:37,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:37,517 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 22:56:37,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:37,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:39,742 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 22:56:39,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:39,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-11-06 22:56:39,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 22:56:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 22:56:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:56:39,762 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 64 states. [2018-11-06 22:56:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:42,311 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-11-06 22:56:42,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-06 22:56:42,312 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2018-11-06 22:56:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:42,313 INFO L225 Difference]: With dead ends: 72 [2018-11-06 22:56:42,313 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:56:42,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 22:56:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:56:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-06 22:56:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-06 22:56:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-11-06 22:56:42,319 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-11-06 22:56:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:42,319 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-11-06 22:56:42,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 22:56:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-11-06 22:56:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-06 22:56:42,320 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:42,320 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:42,320 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:42,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:42,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1450312085, now seen corresponding path program 56 times [2018-11-06 22:56:42,321 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:42,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:42,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:42,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:42,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:42,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:42,329 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:42,329 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 22:56:42,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:42,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:42,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:42,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:44,675 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 22:56:44,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:44,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-11-06 22:56:44,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-11-06 22:56:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-11-06 22:56:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 22:56:44,696 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 65 states. [2018-11-06 22:56:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:47,306 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-11-06 22:56:47,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-06 22:56:47,306 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 68 [2018-11-06 22:56:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:47,307 INFO L225 Difference]: With dead ends: 73 [2018-11-06 22:56:47,307 INFO L226 Difference]: Without dead ends: 70 [2018-11-06 22:56:47,308 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:56:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-06 22:56:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-11-06 22:56:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-06 22:56:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-11-06 22:56:47,312 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-11-06 22:56:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:47,313 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-11-06 22:56:47,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-11-06 22:56:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-11-06 22:56:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-06 22:56:47,314 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:47,314 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:47,314 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:47,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2009939216, now seen corresponding path program 57 times [2018-11-06 22:56:47,314 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:47,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:47,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:47,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:47,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:47,322 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:47,323 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:47,323 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 22:56:47,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:56:53,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-06 22:56:53,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:53,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:55,912 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 22:56:55,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:55,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-11-06 22:56:55,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-06 22:56:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-06 22:56:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:56:55,933 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 66 states. [2018-11-06 22:56:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:58,613 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-11-06 22:56:58,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-06 22:56:58,614 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 69 [2018-11-06 22:56:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:58,615 INFO L225 Difference]: With dead ends: 74 [2018-11-06 22:56:58,615 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:56:58,616 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:56:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:56:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-11-06 22:56:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-06 22:56:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-11-06 22:56:58,620 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-11-06 22:56:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:58,620 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-11-06 22:56:58,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-06 22:56:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-11-06 22:56:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:56:58,621 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:58,621 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:58,621 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:58,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2116456203, now seen corresponding path program 58 times [2018-11-06 22:56:58,622 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:58,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:58,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:58,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:58,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:58,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:56:58,630 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:56:58,630 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 22:56:58,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:56:59,433 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:56:59,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:59,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:01,546 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 22:57:01,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:01,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-11-06 22:57:01,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-06 22:57:01,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-06 22:57:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:57:01,567 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 67 states. [2018-11-06 22:57:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:04,381 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-11-06 22:57:04,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-06 22:57:04,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 70 [2018-11-06 22:57:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:04,382 INFO L225 Difference]: With dead ends: 75 [2018-11-06 22:57:04,383 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:57:04,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:57:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:57:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-06 22:57:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-06 22:57:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-11-06 22:57:04,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-11-06 22:57:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:04,389 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-11-06 22:57:04,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-06 22:57:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-11-06 22:57:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-06 22:57:04,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:04,390 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:04,390 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:04,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1185695312, now seen corresponding path program 59 times [2018-11-06 22:57:04,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:04,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:04,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:04,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:04,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:04,398 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:04,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:04,398 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 22:57:04,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:57:04,640 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-11-06 22:57:04,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:04,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:06,854 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 22:57:06,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:06,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-11-06 22:57:06,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-06 22:57:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-06 22:57:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:57:06,875 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 68 states. [2018-11-06 22:57:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:09,719 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-11-06 22:57:09,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-06 22:57:09,719 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2018-11-06 22:57:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:09,720 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:57:09,720 INFO L226 Difference]: Without dead ends: 73 [2018-11-06 22:57:09,721 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 22:57:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-06 22:57:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-06 22:57:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-06 22:57:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-11-06 22:57:09,725 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-11-06 22:57:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:09,726 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-11-06 22:57:09,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-06 22:57:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-11-06 22:57:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-06 22:57:09,726 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:09,726 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:09,727 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:09,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1898088533, now seen corresponding path program 60 times [2018-11-06 22:57:09,727 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:09,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:09,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:09,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:09,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:09,739 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:09,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:09,739 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 22:57:09,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:57:12,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-06 22:57:12,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:12,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:14,373 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 22:57:14,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:14,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-11-06 22:57:14,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-06 22:57:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-06 22:57:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 22:57:14,394 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 69 states. [2018-11-06 22:57:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:17,484 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-11-06 22:57:17,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-06 22:57:17,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 72 [2018-11-06 22:57:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:17,487 INFO L225 Difference]: With dead ends: 77 [2018-11-06 22:57:17,487 INFO L226 Difference]: Without dead ends: 74 [2018-11-06 22:57:17,488 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:57:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-06 22:57:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-06 22:57:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-06 22:57:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-11-06 22:57:17,493 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-11-06 22:57:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:17,493 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-11-06 22:57:17,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-06 22:57:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-11-06 22:57:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:57:17,494 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:17,494 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:17,494 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:17,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1288860080, now seen corresponding path program 61 times [2018-11-06 22:57:17,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:17,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:17,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:17,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,504 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:17,504 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:17,504 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 22:57:17,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:17,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:21,789 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 22:57:21,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:21,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-11-06 22:57:21,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-06 22:57:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-06 22:57:21,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:57:21,810 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 70 states. [2018-11-06 22:57:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:24,870 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-11-06 22:57:24,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-06 22:57:24,870 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 73 [2018-11-06 22:57:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:24,871 INFO L225 Difference]: With dead ends: 78 [2018-11-06 22:57:24,872 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:57:24,872 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 22:57:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:57:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-06 22:57:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:57:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-11-06 22:57:24,877 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-11-06 22:57:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:24,877 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-11-06 22:57:24,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-06 22:57:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-11-06 22:57:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:57:24,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:24,878 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:24,878 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:24,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1300019275, now seen corresponding path program 62 times [2018-11-06 22:57:24,879 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:24,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:24,888 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:24,888 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:24,888 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 22:57:24,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:57:25,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:57:25,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:25,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:27,627 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 22:57:27,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:27,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-11-06 22:57:27,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-06 22:57:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-06 22:57:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 22:57:27,647 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 71 states. [2018-11-06 22:57:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:30,860 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-11-06 22:57:30,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-06 22:57:30,861 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 74 [2018-11-06 22:57:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:30,862 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:57:30,862 INFO L226 Difference]: Without dead ends: 76 [2018-11-06 22:57:30,862 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 22:57:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-06 22:57:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-11-06 22:57:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-06 22:57:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-11-06 22:57:30,868 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-11-06 22:57:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:30,868 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-11-06 22:57:30,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-06 22:57:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-11-06 22:57:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-06 22:57:30,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:30,869 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:30,869 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:30,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:30,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1645954320, now seen corresponding path program 63 times [2018-11-06 22:57:30,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:30,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:30,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:30,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:30,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:30,878 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:30,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:30,878 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 22:57:30,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:47,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-11-06 22:57:47,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:47,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:49,902 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 22:57:49,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:49,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-11-06 22:57:49,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 22:57:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 22:57:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:57:49,924 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 72 states. [2018-11-06 22:57:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:53,433 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-11-06 22:57:53,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-06 22:57:53,433 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 75 [2018-11-06 22:57:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:53,435 INFO L225 Difference]: With dead ends: 80 [2018-11-06 22:57:53,435 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:57:53,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:57:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:57:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-11-06 22:57:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-06 22:57:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-11-06 22:57:53,441 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-11-06 22:57:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:53,441 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-11-06 22:57:53,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 22:57:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-11-06 22:57:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-06 22:57:53,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:53,442 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:53,442 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:53,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash 514961173, now seen corresponding path program 64 times [2018-11-06 22:57:53,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:53,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:53,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:53,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:53,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:53,451 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:57:53,452 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:57:53,452 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 22:57:53,467 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:57:54,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:57:54,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:54,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:57,196 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 22:57:57,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:57:57,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-11-06 22:57:57,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-06 22:57:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-06 22:57:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:57:57,220 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 73 states. [2018-11-06 22:58:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:00,761 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-11-06 22:58:00,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-06 22:58:00,761 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 76 [2018-11-06 22:58:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:00,762 INFO L225 Difference]: With dead ends: 81 [2018-11-06 22:58:00,762 INFO L226 Difference]: Without dead ends: 78 [2018-11-06 22:58:00,763 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:58:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-06 22:58:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-06 22:58:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-06 22:58:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-11-06 22:58:00,768 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-11-06 22:58:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-11-06 22:58:00,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-06 22:58:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-11-06 22:58:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-06 22:58:00,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:00,770 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:00,770 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:00,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1216135280, now seen corresponding path program 65 times [2018-11-06 22:58:00,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:00,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:00,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:00,779 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:00,779 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:00,779 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 22:58:00,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:58:01,102 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-11-06 22:58:01,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:01,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:03,578 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 22:58:03,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:03,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-11-06 22:58:03,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-06 22:58:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-06 22:58:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:58:03,601 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 74 states. [2018-11-06 22:58:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:07,381 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-11-06 22:58:07,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-06 22:58:07,382 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 77 [2018-11-06 22:58:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:07,383 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:58:07,383 INFO L226 Difference]: Without dead ends: 79 [2018-11-06 22:58:07,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 22:58:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-06 22:58:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-06 22:58:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:58:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-06 22:58:07,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-11-06 22:58:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:07,389 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-06 22:58:07,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-06 22:58:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-06 22:58:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:58:07,389 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:07,389 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:07,389 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:07,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash 954449525, now seen corresponding path program 66 times [2018-11-06 22:58:07,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:07,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:07,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:07,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:07,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:07,397 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:07,397 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:07,397 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 22:58:07,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:58:10,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-11-06 22:58:10,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:10,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:13,906 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 22:58:13,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:13,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-11-06 22:58:13,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-06 22:58:13,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-06 22:58:13,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 22:58:13,934 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 75 states. [2018-11-06 22:58:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:17,837 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-11-06 22:58:17,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-06 22:58:17,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 78 [2018-11-06 22:58:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:17,839 INFO L225 Difference]: With dead ends: 83 [2018-11-06 22:58:17,839 INFO L226 Difference]: Without dead ends: 80 [2018-11-06 22:58:17,840 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:58:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-06 22:58:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-11-06 22:58:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-06 22:58:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-11-06 22:58:17,846 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-11-06 22:58:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:17,846 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-11-06 22:58:17,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-06 22:58:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-11-06 22:58:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-06 22:58:17,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:17,847 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:17,847 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:17,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:17,847 INFO L82 PathProgramCache]: Analyzing trace with hash -476898256, now seen corresponding path program 67 times [2018-11-06 22:58:17,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:17,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:17,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:17,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:17,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:17,856 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-06 22:58:17,857 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-06 22:58:17,857 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 22:58:17,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:18,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:21,917 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 22:58:21,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:58:21,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-11-06 22:58:21,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-06 22:58:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-06 22:58:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:58:21,939 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 76 states. Received shutdown request... [2018-11-06 22:58:25,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-06 22:58:25,668 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:58:25,675 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:58:25,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:58:25 BoogieIcfgContainer [2018-11-06 22:58:25,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:58:25,677 INFO L168 Benchmark]: Toolchain (without parser) took 250987.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.4 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,678 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:58:25,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.17 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 22:58:25,678 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.90 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 22:58:25,679 INFO L168 Benchmark]: Boogie Preprocessor took 20.10 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 22:58:25,679 INFO L168 Benchmark]: RCFGBuilder took 423.25 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.4 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -758.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,680 INFO L168 Benchmark]: TraceAbstraction took 250169.73 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 132.1 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -43.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB. [2018-11-06 22:58:25,682 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.17 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 37.90 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 20.10 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 423.25 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.4 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -758.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250169.73 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 132.1 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -43.7 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 64). Cancelled while BasicCegarLoop was constructing difference of abstraction (80states) and FLOYD_HOARE automaton (currently 75 states, 76 states before enhancement),while ReachableStatesComputation was computing reachable states (76 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 250.0s OverallTime, 68 OverallIterations, 67 TraceHistogramMax, 103.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 420 SDtfs, 100 SDslu, 10821 SDs, 0 SdLazy, 143280 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3093 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 2823 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 88.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 67 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 54.6s SatisfiabilityAnalysisTime, 87.9s InterpolantComputationTime, 3094 NumberOfCodeBlocks, 3094 NumberOfCodeBlocksAsserted, 673 NumberOfCheckSat, 3026 ConstructedInterpolants, 0 QuantifiedInterpolants, 1054636 SizeOfPredicates, 340 NumberOfNonLiveVariables, 14586 ConjunctsInSsa, 11224 ConjunctsInUnsatCore, 68 InterpolantComputations, 1 PerfectInterpolantSequences, 0/52394 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown