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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:39:44,842 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:39:44,844 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:39:44,857 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:39:44,857 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:39:44,858 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:39:44,860 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:39:44,861 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:39:44,863 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:39:44,864 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:39:44,865 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:39:44,865 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:39:44,866 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:39:44,867 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:39:44,868 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:39:44,869 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:39:44,870 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:39:44,872 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:39:44,874 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:39:44,875 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:39:44,876 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:39:44,877 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:39:44,880 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-23 19:39:44,880 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-23 19:39:44,880 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-23 19:39:44,881 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-23 19:39:44,886 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-23 19:39:44,887 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-23 19:39:44,887 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-23 19:39:44,891 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-23 19:39:44,891 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-23 19:39:44,892 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-23 19:39:44,892 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-23 19:39:44,892 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-23 19:39:44,896 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-23 19:39:44,897 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-23 19:39:44,897 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:39:44,928 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:39:44,928 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:39:44,930 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:39:44,930 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:39:44,931 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:39:44,931 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:39:44,931 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:39:44,931 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:39:44,932 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:39:44,932 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:39:44,932 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:39:44,932 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:39:44,932 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:39:44,933 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:39:44,933 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:39:44,933 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:39:44,933 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:39:44,933 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:39:44,935 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:39:44,935 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:39:44,935 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:39:44,935 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:39:44,935 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:39:44,936 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:39:44,936 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:39:44,936 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:39:44,936 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:39:44,936 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:39:44,937 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:39:44,937 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:39:45,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:39:45,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:39:45,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:39:45,035 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:39:45,036 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:39:45,037 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl [2018-09-23 19:39:45,037 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl' [2018-09-23 19:39:45,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:39:45,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:39:45,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:45,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:39:45,101 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:39:45,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:45,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:39:45,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:39:45,146 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:39:45,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/1) ... [2018-09-23 19:39:45,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:39:45,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:39:45,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:39:45,168 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:39:45,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (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 [2018-09-23 19:39:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:39:45,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:39:45,449 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:39:45,450 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:39:45 BoogieIcfgContainer [2018-09-23 19:39:45,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:39:45,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:39:45,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:39:45,454 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:39:45,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:45" (1/2) ... [2018-09-23 19:39:45,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b11fda and model type gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:39:45, skipping insertion in model container [2018-09-23 19:39:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:39:45" (2/2) ... [2018-09-23 19:39:45,458 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bpl [2018-09-23 19:39:45,468 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:39:45,476 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:39:45,529 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:39:45,530 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:39:45,530 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:39:45,531 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:39:45,531 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:39:45,531 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:39:45,531 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:39:45,531 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:39:45,532 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:39:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:39:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:39:45,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:45,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:39:45,557 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:45,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 19:39:45,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:45,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:45,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:45,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,657 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:45,657 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:45,657 INFO L227 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 [2018-09-23 19:39:45,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:45,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:45,851 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:39:45,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:39:45,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:39:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:39:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:39:45,875 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:39:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:45,926 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 19:39:45,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:39:45,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 19:39:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:45,940 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:39:45,940 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:39:45,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:39:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:39:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:39:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:39:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:39:45,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 19:39:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:45,984 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:39:45,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:39:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:39:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:39:45,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:45,985 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 19:39:45,985 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:45,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 19:39:45,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:45,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:45,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:45,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,995 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:45,995 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:45,996 INFO L227 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 [2018-09-23 19:39:46,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:46,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:46,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-23 19:39:46,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:39:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:39:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:46,140 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-23 19:39:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,202 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:39:46,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:39:46,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:39:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,204 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:39:46,204 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:39:46,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:39:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:39:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:39:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:39:46,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-23 19:39:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,210 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:39:46,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:39:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:39:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:39:46,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,211 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-23 19:39:46,211 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-23 19:39:46,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,220 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:46,221 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:46,221 INFO L227 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 [2018-09-23 19:39:46,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:46,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:46,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:46,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-23 19:39:46,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:39:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:39:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:46,431 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-23 19:39:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,508 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:39:46,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:39:46,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:39:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,509 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:39:46,509 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:39:46,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:39:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:39:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:39:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:39:46,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-23 19:39:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,516 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:39:46,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:39:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:39:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:39:46,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,517 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 19:39:46,517 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-23 19:39:46,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,527 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:46,528 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:46,528 INFO L227 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 [2018-09-23 19:39:46,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:46,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:39:46,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:46,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-23 19:39:46,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:39:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:39:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:39:46,912 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-23 19:39:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,970 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:39:46,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:39:46,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 19:39:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,972 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:39:46,973 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:39:46,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:39:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:39:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:39:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:39:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:39:46,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-23 19:39:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,981 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:39:46,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:39:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:39:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:39:46,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,982 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-23 19:39:46,982 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-23 19:39:46,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:46,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,994 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:46,994 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:46,994 INFO L227 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 [2018-09-23 19:39:47,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:47,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:47,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:47,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:47,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:47,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-23 19:39:47,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:39:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:39:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:39:47,292 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-23 19:39:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:47,396 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:39:47,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:39:47,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 19:39:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:47,397 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:39:47,397 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:39:47,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:39:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:39:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:39:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:39:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:39:47,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-23 19:39:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:47,403 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:39:47,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:39:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:39:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:39:47,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:47,404 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 19:39:47,404 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:47,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-23 19:39:47,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:47,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:47,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:47,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,416 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:47,416 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:47,416 INFO L227 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 [2018-09-23 19:39:47,425 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:47,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:39:47,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:47,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:47,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:47,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-23 19:39:47,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:39:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:39:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:39:47,629 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-23 19:39:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:47,943 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:39:47,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:39:47,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 19:39:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:47,946 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:39:47,946 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:39:47,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:39:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:39:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:39:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:39:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:39:47,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-23 19:39:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:47,959 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:39:47,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:39:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:39:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:39:47,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:47,960 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-23 19:39:47,961 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:47,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-23 19:39:47,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:47,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,989 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:47,990 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:47,990 INFO L227 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 [2018-09-23 19:39:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:48,049 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:39:48,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:48,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:48,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-23 19:39:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:39:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:39:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:48,235 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-23 19:39:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,389 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:39:48,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:39:48,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:39:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,393 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:39:48,393 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:39:48,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:39:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:39:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:39:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:39:48,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-23 19:39:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:48,400 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:39:48,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:39:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:39:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:39:48,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:48,401 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 19:39:48,401 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:48,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:48,402 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-23 19:39:48,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:48,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,414 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:48,414 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:48,415 INFO L227 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 [2018-09-23 19:39:48,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:48,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:48,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-23 19:39:48,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:39:48,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:39:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:48,643 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-23 19:39:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,745 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:39:48,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:39:48,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:39:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,748 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:39:48,748 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:39:48,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:39:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:39:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:39:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:39:48,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-23 19:39:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:48,754 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:39:48,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:39:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:39:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:39:48,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:48,755 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-23 19:39:48,756 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:48,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-23 19:39:48,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:48,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:48,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:48,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,767 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:48,767 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:48,767 INFO L227 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 [2018-09-23 19:39:48,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:48,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:48,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:48,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:49,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-23 19:39:49,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:39:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:39:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:39:49,049 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-23 19:39:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:49,240 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:39:49,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:39:49,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 19:39:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:49,241 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:39:49,242 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:39:49,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:39:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:39:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:39:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:39:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:39:49,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-23 19:39:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:49,248 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:39:49,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:39:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:39:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:39:49,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:49,250 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 19:39:49,250 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:49,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-23 19:39:49,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:49,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,262 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:49,262 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:49,262 INFO L227 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 [2018-09-23 19:39:49,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:49,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:39:49,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:49,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:49,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-23 19:39:49,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:39:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:39:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:49,519 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-23 19:39:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:49,700 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:39:49,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:39:49,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 19:39:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:49,701 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:39:49,702 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:39:49,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:39:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:39:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:39:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:39:49,709 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-23 19:39:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:49,710 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:39:49,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:39:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:39:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:39:49,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:49,711 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-23 19:39:49,711 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:49,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-23 19:39:49,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:49,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,723 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:49,723 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:49,723 INFO L227 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 [2018-09-23 19:39:49,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:49,758 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:49,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:49,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:50,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:50,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-23 19:39:50,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:39:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:39:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:39:50,087 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-23 19:39:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:50,363 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:39:50,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:39:50,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 19:39:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:50,365 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:39:50,365 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:39:50,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:39:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:39:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:39:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:39:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:39:50,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-23 19:39:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:50,374 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:39:50,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:39:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:39:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:39:50,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:50,375 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 19:39:50,375 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:50,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-23 19:39:50,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:50,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:50,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:50,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:50,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:50,388 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:50,388 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:50,389 INFO L227 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 [2018-09-23 19:39:50,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:50,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:39:50,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:50,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:50,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:50,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-23 19:39:50,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:39:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:39:50,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:50,933 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-23 19:39:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:51,077 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:39:51,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:39:51,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 19:39:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:51,079 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:39:51,080 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:39:51,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:39:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:39:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:39:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:39:51,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-23 19:39:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:51,091 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:39:51,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:39:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:39:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:39:51,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:51,092 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-23 19:39:51,092 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:51,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-23 19:39:51,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:51,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:51,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:51,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:51,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:51,116 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:51,117 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:51,117 INFO L227 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 [2018-09-23 19:39:51,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:51,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:39:51,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:51,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:51,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:51,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-23 19:39:51,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:39:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:39:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:51,428 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-23 19:39:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:51,858 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:39:51,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:39:51,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 19:39:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:51,859 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:39:51,859 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:39:51,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:39:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:39:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:39:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:39:51,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-23 19:39:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:51,868 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:39:51,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:39:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:39:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:39:51,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:51,869 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 19:39:51,869 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:51,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-23 19:39:51,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:51,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:51,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:51,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:51,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:51,880 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:51,881 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:51,881 INFO L227 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 [2018-09-23 19:39:51,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:51,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:53,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:53,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-23 19:39:53,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:39:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:39:53,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:39:53,325 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-23 19:39:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:53,853 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:39:53,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:39:53,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 19:39:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:53,854 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:39:53,854 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:39:53,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:39:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:39:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:39:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:39:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:39:53,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-23 19:39:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:53,861 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:39:53,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:39:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:39:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:39:53,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:53,863 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-23 19:39:53,863 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:53,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-23 19:39:53,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:53,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:53,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:53,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,875 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:53,875 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:53,875 INFO L227 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 [2018-09-23 19:39:53,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:53,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:53,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:53,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:54,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-23 19:39:54,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:39:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:39:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:54,423 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-23 19:39:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:54,695 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:39:54,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:39:54,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 19:39:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:54,696 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:39:54,696 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:39:54,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:39:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:39:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:39:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:39:54,702 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-23 19:39:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:54,703 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:39:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:39:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:39:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:39:54,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:54,704 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 19:39:54,704 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:54,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-23 19:39:54,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:54,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:54,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:54,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:54,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:54,716 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:54,716 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:54,716 INFO L227 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 [2018-09-23 19:39:54,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:54,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:39:54,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:54,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:55,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:55,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-23 19:39:55,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:39:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:39:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:55,115 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-23 19:39:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:55,346 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:39:55,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:39:55,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 19:39:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:55,349 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:39:55,349 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:39:55,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:39:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:39:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:39:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:39:55,356 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-23 19:39:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:55,356 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:39:55,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:39:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:39:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:39:55,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:55,357 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-23 19:39:55,358 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:55,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-23 19:39:55,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:55,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:55,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:55,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:55,369 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:55,370 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:55,370 INFO L227 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 [2018-09-23 19:39:55,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:55,421 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:55,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:55,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:55,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:55,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-23 19:39:55,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:39:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:39:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:39:55,801 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-23 19:39:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:56,064 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:39:56,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:39:56,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 19:39:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:56,074 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:39:56,074 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:39:56,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:39:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:39:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:39:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:39:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:39:56,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-23 19:39:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:56,082 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:39:56,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:39:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:39:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:39:56,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:56,083 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 19:39:56,083 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:56,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-23 19:39:56,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:56,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:56,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:56,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,094 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:56,094 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:56,094 INFO L227 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 [2018-09-23 19:39:56,112 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:56,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:39:56,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:56,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:56,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:56,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-23 19:39:56,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:39:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:39:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:39:56,613 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-23 19:39:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:57,130 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:39:57,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:39:57,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 19:39:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:57,131 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:39:57,131 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:39:57,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:39:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:39:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:39:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:39:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:39:57,142 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-23 19:39:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:57,142 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:39:57,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:39:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:39:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:39:57,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:57,143 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-23 19:39:57,148 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:57,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-23 19:39:57,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:57,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:57,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:57,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:57,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:57,171 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:57,171 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:57,172 INFO L227 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 [2018-09-23 19:39:57,188 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:57,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:39:57,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:57,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:57,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:57,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-23 19:39:57,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:39:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:39:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:57,691 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-23 19:39:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:58,404 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:39:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:39:58,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 19:39:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:58,406 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:39:58,406 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:39:58,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:39:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:39:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:39:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:39:58,412 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-23 19:39:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:58,413 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:39:58,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:39:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:39:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:39:58,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:58,414 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 19:39:58,414 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:58,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-23 19:39:58,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:58,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:58,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:58,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:58,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:58,424 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:58,425 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:58,425 INFO L227 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 [2018-09-23 19:39:58,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:58,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:58,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:58,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-23 19:39:58,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:39:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:39:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:58,879 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-23 19:39:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:59,395 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:39:59,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:39:59,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 19:39:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:59,396 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:39:59,396 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:39:59,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:39:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:39:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:39:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:39:59,405 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-23 19:39:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:59,405 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:39:59,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:39:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:39:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:39:59,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:59,406 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-23 19:39:59,406 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:59,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-23 19:39:59,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:59,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:59,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:59,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:59,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:59,416 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:39:59,416 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:39:59,416 INFO L227 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 [2018-09-23 19:39:59,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:59,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:59,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:59,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:59,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:39:59,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-23 19:39:59,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:39:59,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:39:59,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:39:59,796 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-23 19:40:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:00,197 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:40:00,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:40:00,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 19:40:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:00,199 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:40:00,199 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:40:00,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:40:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:40:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:40:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:40:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:40:00,206 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-23 19:40:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:00,207 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:40:00,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:40:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:40:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:40:00,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:00,208 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 19:40:00,208 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:00,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-23 19:40:00,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:00,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:00,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,217 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:00,217 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:00,218 INFO L227 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 [2018-09-23 19:40:00,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:00,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:40:00,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:00,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:00,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-23 19:40:00,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:40:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:40:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:40:00,971 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-23 19:40:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:01,339 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:40:01,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:40:01,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 19:40:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:01,342 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:40:01,343 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:40:01,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:40:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:40:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:40:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:40:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:40:01,348 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-23 19:40:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:01,348 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:40:01,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:40:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:40:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:40:01,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:01,349 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-23 19:40:01,349 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:01,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-23 19:40:01,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:01,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:01,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:01,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:01,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:01,358 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:01,358 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:01,358 INFO L227 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 [2018-09-23 19:40:01,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:01,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:01,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:01,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:01,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:01,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-23 19:40:01,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:40:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:40:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:40:01,830 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-23 19:40:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:02,285 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:40:02,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:40:02,286 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 19:40:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:02,286 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:40:02,287 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:40:02,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:40:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:40:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:40:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:40:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:40:02,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-23 19:40:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:02,296 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:40:02,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:40:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:40:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:40:02,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:02,296 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 19:40:02,297 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:02,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-23 19:40:02,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:02,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:02,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:02,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,306 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:02,306 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:02,306 INFO L227 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 [2018-09-23 19:40:02,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:02,369 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:40:02,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:02,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:02,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:02,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-23 19:40:02,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:40:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:40:02,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:40:02,890 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-23 19:40:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:03,348 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:40:03,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:40:03,349 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 19:40:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:03,350 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:40:03,350 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:40:03,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:40:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:40:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:40:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:40:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:40:03,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-23 19:40:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:03,356 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:40:03,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:40:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:40:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:40:03,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:03,357 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-23 19:40:03,357 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:03,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:03,358 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-23 19:40:03,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:03,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:03,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:03,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:03,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:03,366 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:03,366 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:03,366 INFO L227 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 [2018-09-23 19:40:03,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:03,471 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:40:03,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:03,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:03,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:03,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-23 19:40:03,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:40:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:40:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:40:03,992 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-23 19:40:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:04,588 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:40:04,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:40:04,588 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 19:40:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:04,589 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:40:04,589 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:40:04,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:40:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:40:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:40:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:40:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:40:04,600 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-23 19:40:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:04,600 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:40:04,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:40:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:40:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:40:04,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:04,601 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 19:40:04,602 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:04,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-23 19:40:04,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:04,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:04,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:04,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:04,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:04,611 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:04,611 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:04,611 INFO L227 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 [2018-09-23 19:40:04,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:04,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:05,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-23 19:40:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:40:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:40:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:40:05,133 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-23 19:40:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:05,695 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:40:05,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:40:05,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 19:40:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:05,696 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:40:05,696 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:40:05,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:40:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:40:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:40:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:40:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:40:05,702 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-23 19:40:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:05,702 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:40:05,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:40:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:40:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:40:05,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:05,703 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-23 19:40:05,704 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:05,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-23 19:40:05,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:05,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,711 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:05,712 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:05,712 INFO L227 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 [2018-09-23 19:40:05,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:05,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:05,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:05,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:06,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:06,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-23 19:40:06,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:40:06,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:40:06,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:40:06,264 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-23 19:40:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:06,941 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:40:06,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:40:06,941 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 19:40:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:06,942 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:40:06,942 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:40:06,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:40:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:40:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:40:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:40:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:40:06,950 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-23 19:40:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:06,950 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:40:06,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:40:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:40:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:40:06,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:06,951 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 19:40:06,952 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:06,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-23 19:40:06,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:06,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:06,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:06,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,960 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:06,960 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:06,960 INFO L227 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 [2018-09-23 19:40:06,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:07,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:40:07,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:07,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:08,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:08,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-23 19:40:08,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:40:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:40:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:40:08,038 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-23 19:40:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:08,656 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:40:08,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:40:08,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 19:40:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:08,657 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:40:08,658 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:40:08,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:40:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:40:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:40:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:40:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:40:08,665 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-23 19:40:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:08,665 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:40:08,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:40:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:40:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:40:08,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:08,666 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-23 19:40:08,666 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:08,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-23 19:40:08,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:08,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:08,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:08,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:08,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:08,675 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:08,675 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:08,675 INFO L227 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) [2018-09-23 19:40:08,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:40:08,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:08,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:08,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:09,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:09,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-23 19:40:09,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:40:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:40:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:40:09,266 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-23 19:40:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:09,922 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:40:09,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:40:09,922 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 19:40:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:09,923 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:40:09,923 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:40:09,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:40:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:40:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:40:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:40:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:40:09,930 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-23 19:40:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:09,930 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:40:09,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:40:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:40:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:40:09,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:09,931 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 19:40:09,932 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:09,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-23 19:40:09,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:09,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,940 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:09,941 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:09,941 INFO L227 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 [2018-09-23 19:40:09,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:10,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:40:10,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:10,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:10,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:10,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-23 19:40:10,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:40:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:40:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:40:10,730 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-23 19:40:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:11,497 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:40:11,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:40:11,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 19:40:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:11,498 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:40:11,499 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:40:11,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:40:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:40:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:40:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:40:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:40:11,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-23 19:40:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:11,506 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:40:11,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:40:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:40:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:40:11,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:11,507 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-23 19:40:11,507 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:11,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-23 19:40:11,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:11,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:11,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:11,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:11,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:11,514 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:11,515 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:11,515 INFO L227 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 [2018-09-23 19:40:11,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:11,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:40:11,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:11,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:12,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:12,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-23 19:40:12,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:40:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:40:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:40:12,821 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-23 19:40:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:13,599 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:40:13,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:40:13,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 19:40:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:13,600 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:40:13,600 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:40:13,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:40:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:40:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:40:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:40:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:40:13,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-23 19:40:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:13,608 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:40:13,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:40:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:40:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:40:13,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:13,609 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-23 19:40:13,609 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:13,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-23 19:40:13,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:13,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:13,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:13,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,617 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:13,617 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:13,617 INFO L227 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) [2018-09-23 19:40:13,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:40:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:13,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:14,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:14,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-23 19:40:14,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:40:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:40:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:40:14,340 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-23 19:40:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:15,265 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:40:15,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:40:15,266 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 19:40:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:15,267 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:40:15,267 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:40:15,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:40:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:40:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:40:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:40:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:40:15,274 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-23 19:40:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:15,274 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:40:15,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:40:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:40:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:40:15,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:15,275 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-23 19:40:15,275 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:15,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-23 19:40:15,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:15,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:15,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:15,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:15,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:15,283 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:15,283 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:15,283 INFO L227 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 [2018-09-23 19:40:15,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:15,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:15,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:15,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:16,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:16,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-23 19:40:16,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:40:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:40:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:40:16,039 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-23 19:40:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:16,860 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:40:16,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:40:16,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 19:40:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:16,862 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:40:16,862 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:40:16,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:40:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:40:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:40:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:40:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:40:16,870 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-23 19:40:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:16,871 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:40:16,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:40:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:40:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:40:16,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:16,872 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-23 19:40:16,872 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:16,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-23 19:40:16,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:16,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:16,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:16,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,881 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:16,881 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:16,881 INFO L227 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 [2018-09-23 19:40:16,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:17,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:40:17,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:17,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:18,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:18,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-23 19:40:18,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:40:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:40:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:40:18,574 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-23 19:40:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:19,399 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:40:19,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:40:19,400 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 19:40:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:19,401 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:40:19,401 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:40:19,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:40:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:40:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:40:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:40:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:40:19,407 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-23 19:40:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:19,408 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:40:19,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:40:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:40:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:40:19,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:19,408 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-23 19:40:19,409 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:19,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-23 19:40:19,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:19,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:19,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:19,417 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:19,417 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:19,417 INFO L227 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 [2018-09-23 19:40:19,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:19,510 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:19,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:19,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:21,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:21,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-23 19:40:21,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:40:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:40:21,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:40:21,008 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-23 19:40:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:21,899 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:40:21,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:40:21,899 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 19:40:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:21,900 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:40:21,901 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:40:21,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:40:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:40:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:40:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:40:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:40:21,907 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-23 19:40:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:21,907 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:40:21,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:40:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:40:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:40:21,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:21,908 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-23 19:40:21,908 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:21,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-23 19:40:21,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:21,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:21,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:21,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:21,916 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:21,917 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:21,917 INFO L227 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 [2018-09-23 19:40:21,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:22,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:40:22,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:22,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:23,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:23,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-23 19:40:23,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:40:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:40:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:40:23,446 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-23 19:40:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:24,403 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:40:24,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:40:24,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 19:40:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:24,404 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:40:24,404 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:40:24,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:40:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:40:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:40:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:40:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:40:24,411 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-23 19:40:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:24,411 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:40:24,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:40:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:40:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:40:24,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:24,412 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-23 19:40:24,412 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:24,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-23 19:40:24,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:24,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:24,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:24,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:24,420 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:24,421 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:24,421 INFO L227 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 [2018-09-23 19:40:24,435 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:24,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:40:24,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:24,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:25,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:25,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-23 19:40:25,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:40:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:40:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:40:25,592 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-23 19:40:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:26,598 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:40:26,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:40:26,599 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 19:40:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:26,600 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:40:26,600 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:40:26,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:40:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:40:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:40:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:40:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:40:26,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-23 19:40:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:26,606 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:40:26,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:40:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:40:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:40:26,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:26,606 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-23 19:40:26,607 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:26,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:26,607 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-23 19:40:26,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:26,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:26,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:26,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:26,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:26,615 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:26,615 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:26,615 INFO L227 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 [2018-09-23 19:40:26,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:26,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:27,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:27,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-23 19:40:27,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:40:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:40:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:40:27,534 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-23 19:40:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:28,718 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:40:28,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:40:28,719 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 19:40:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:28,720 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:40:28,720 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:40:28,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:40:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:40:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:40:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:40:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:40:28,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-23 19:40:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:28,726 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:40:28,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:40:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:40:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:40:28,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:28,727 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-23 19:40:28,727 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:28,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-23 19:40:28,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:28,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:28,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:28,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:28,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:28,736 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:28,736 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:28,736 INFO L227 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 [2018-09-23 19:40:28,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:28,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:28,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:28,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:29,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:29,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-23 19:40:29,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:40:29,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:40:29,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:40:29,652 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-23 19:40:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:30,776 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:40:30,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:40:30,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 19:40:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:30,777 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:40:30,777 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:40:30,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:40:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:40:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:40:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:40:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:40:30,782 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-23 19:40:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:30,782 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:40:30,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:40:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:40:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:40:30,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:30,783 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-23 19:40:30,783 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:30,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-23 19:40:30,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:30,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:30,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:30,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:30,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:30,790 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:30,791 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:30,791 INFO L227 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 [2018-09-23 19:40:30,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:32,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:40:32,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:32,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:33,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:33,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-23 19:40:33,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:40:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:40:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:40:33,467 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-23 19:40:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:34,631 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:40:34,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:40:34,631 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 19:40:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:34,632 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:40:34,632 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:40:34,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:40:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:40:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:40:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:40:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:40:34,638 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-23 19:40:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:34,639 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:40:34,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:40:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:40:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:40:34,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:34,639 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-23 19:40:34,639 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:34,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-23 19:40:34,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:34,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:34,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:34,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:34,648 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:34,648 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:34,648 INFO L227 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 [2018-09-23 19:40:34,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:34,763 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:34,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:34,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:36,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:36,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-23 19:40:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:40:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:40:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:40:36,504 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-23 19:40:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:37,690 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:40:37,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:40:37,691 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 19:40:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:37,692 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:40:37,692 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:40:37,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:40:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:40:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:40:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:40:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:40:37,701 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-23 19:40:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:37,702 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:40:37,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:40:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:40:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:40:37,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:37,703 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-23 19:40:37,703 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:37,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-23 19:40:37,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:37,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:37,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:37,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,711 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:37,712 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:37,712 INFO L227 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 [2018-09-23 19:40:37,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:37,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:40:37,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:37,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:39,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:39,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-23 19:40:39,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:40:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:40:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:40:39,764 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-23 19:40:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:41,056 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:40:41,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:40:41,057 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 19:40:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:41,058 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:40:41,058 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:40:41,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:40:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:40:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:40:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:40:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:40:41,064 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-23 19:40:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:41,064 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:40:41,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:40:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:40:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:40:41,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:41,065 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-23 19:40:41,065 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:41,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-23 19:40:41,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:41,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:41,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:41,073 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:41,073 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:41,073 INFO L227 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 [2018-09-23 19:40:41,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:41,508 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:40:41,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:41,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:42,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:42,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-23 19:40:42,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:40:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:40:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:40:42,603 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-23 19:40:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:44,090 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:40:44,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:40:44,091 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 19:40:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:44,092 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:40:44,092 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:40:44,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:40:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:40:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:40:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:40:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:40:44,098 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-23 19:40:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:44,099 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:40:44,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:40:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:40:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:40:44,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:44,099 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-23 19:40:44,099 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:44,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-23 19:40:44,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:44,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:44,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:44,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:44,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:44,107 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:44,107 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:44,107 INFO L227 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 [2018-09-23 19:40:44,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:44,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:45,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:45,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-23 19:40:45,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:40:45,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:40:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:40:45,254 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-23 19:40:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:46,641 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:40:46,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:40:46,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 19:40:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:46,642 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:40:46,642 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:40:46,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:40:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:40:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:40:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:40:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:40:46,648 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-23 19:40:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:46,648 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:40:46,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:40:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:40:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:40:46,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:46,648 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-23 19:40:46,649 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:46,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-23 19:40:46,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:46,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:46,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:46,656 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:46,656 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:46,656 INFO L227 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 [2018-09-23 19:40:46,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:46,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:46,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:46,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:47,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:47,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-23 19:40:47,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:40:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:40:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:40:47,888 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-23 19:40:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:49,481 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:40:49,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:40:49,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 19:40:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:49,483 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:40:49,483 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:40:49,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:40:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:40:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:40:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:40:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:40:49,491 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-23 19:40:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:49,491 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:40:49,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:40:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:40:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:40:49,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:49,492 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-23 19:40:49,492 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:49,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-23 19:40:49,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:49,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:49,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:49,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:49,500 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:49,500 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:49,500 INFO L227 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 [2018-09-23 19:40:49,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:52,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:40:52,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:52,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:53,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:53,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-23 19:40:53,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:40:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:40:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:40:53,348 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-23 19:40:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:54,986 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:40:54,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:40:54,987 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 19:40:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:54,988 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:40:54,988 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:40:54,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:40:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:40:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:40:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:40:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:40:54,993 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-23 19:40:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:54,994 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:40:54,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:40:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:40:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:40:54,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:54,994 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-23 19:40:54,995 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:54,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-23 19:40:54,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:54,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:54,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:55,002 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:55,003 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:55,003 INFO L227 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 [2018-09-23 19:40:55,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:55,137 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:55,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:55,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:57,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:40:57,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-23 19:40:57,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:40:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:40:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:40:57,294 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-23 19:40:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:59,001 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:40:59,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:40:59,001 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 19:40:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:59,002 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:40:59,002 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:40:59,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:40:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:40:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:40:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:40:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:40:59,011 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-23 19:40:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:59,012 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:40:59,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:40:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:40:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:40:59,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:59,013 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-23 19:40:59,013 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:59,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-23 19:40:59,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:59,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:59,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:59,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:59,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:59,022 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:40:59,022 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:40:59,022 INFO L227 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 [2018-09-23 19:40:59,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:59,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:40:59,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:59,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:00,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:00,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-23 19:41:00,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:41:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:41:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:41:00,483 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-23 19:41:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:02,158 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:41:02,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:41:02,158 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 19:41:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:02,159 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:41:02,160 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:41:02,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:41:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:41:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:41:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:41:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:41:02,168 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-23 19:41:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:02,168 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:41:02,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:41:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:41:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:41:02,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:02,169 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-23 19:41:02,169 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:02,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-23 19:41:02,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:02,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:02,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:02,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:02,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:02,178 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:02,178 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:02,178 INFO L227 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 [2018-09-23 19:41:02,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:04,265 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:41:04,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:04,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:05,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:05,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-23 19:41:05,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:41:05,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:41:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:41:05,523 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-23 19:41:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:07,305 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:41:07,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:41:07,305 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 19:41:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:07,306 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:41:07,306 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:41:07,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:41:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:41:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:41:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:41:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:41:07,315 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-23 19:41:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:07,316 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:41:07,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:41:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:41:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:41:07,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:07,317 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-23 19:41:07,317 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:07,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-23 19:41:07,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:07,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:07,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:07,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:07,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:07,325 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:07,325 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:07,325 INFO L227 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 [2018-09-23 19:41:07,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:07,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:09,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:09,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-23 19:41:09,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:41:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:41:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:41:09,008 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-23 19:41:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:10,878 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:41:10,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:41:10,878 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 19:41:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:10,879 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:41:10,879 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:41:10,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:41:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:41:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:41:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:41:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:41:10,887 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-23 19:41:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:10,887 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:41:10,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:41:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:41:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:41:10,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:10,888 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-23 19:41:10,888 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:10,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-23 19:41:10,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:10,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:10,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:10,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:10,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:10,896 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:10,897 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:10,897 INFO L227 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 [2018-09-23 19:41:10,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:11,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:11,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:11,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:13,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:13,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-23 19:41:13,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:41:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:41:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:41:13,321 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-23 19:41:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:15,392 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:41:15,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:41:15,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 19:41:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:15,394 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:41:15,394 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:41:15,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:41:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:41:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:41:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:41:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:41:15,402 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-23 19:41:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:15,403 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:41:15,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:41:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:41:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:41:15,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:15,403 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-23 19:41:15,404 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:15,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-23 19:41:15,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:15,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:15,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:15,413 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:15,413 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:15,413 INFO L227 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 [2018-09-23 19:41:15,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:20,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:41:20,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:20,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:21,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:21,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-09-23 19:41:21,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:41:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:41:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:41:21,752 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-23 19:41:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:23,755 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:41:23,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:41:23,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 19:41:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:23,757 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:41:23,757 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:41:23,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:41:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:41:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:41:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:41:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:41:23,763 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-23 19:41:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:23,763 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:41:23,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:41:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:41:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:41:23,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:23,764 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-23 19:41:23,764 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:23,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-23 19:41:23,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:23,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:23,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:23,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:23,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:23,771 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:23,771 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:23,772 INFO L227 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 [2018-09-23 19:41:23,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:23,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:23,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:23,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:25,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:25,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-09-23 19:41:25,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:41:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:41:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:41:25,682 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-23 19:41:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:27,719 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:41:27,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:41:27,720 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 19:41:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:27,721 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:41:27,721 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:41:27,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:41:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:41:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:41:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:41:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:41:27,729 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-23 19:41:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:27,729 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:41:27,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:41:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:41:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:41:27,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:27,730 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-23 19:41:27,731 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:27,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-23 19:41:27,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:27,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:27,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:27,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:27,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:27,739 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:27,739 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:27,739 INFO L227 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 [2018-09-23 19:41:27,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:27,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:41:27,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:27,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:29,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:29,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-09-23 19:41:29,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:41:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:41:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:41:29,797 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-23 19:41:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:31,904 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:41:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:41:31,905 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 19:41:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:31,906 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:41:31,906 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:41:31,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:41:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:41:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:41:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:41:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:41:31,912 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-23 19:41:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:31,912 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:41:31,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:41:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:41:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:41:31,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:31,913 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-23 19:41:31,913 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:31,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-23 19:41:31,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:31,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:31,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:31,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:31,921 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:31,921 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:31,921 INFO L227 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 [2018-09-23 19:41:31,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:34,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:41:34,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:34,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:36,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:36,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-09-23 19:41:36,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:41:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:41:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:41:36,149 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-23 19:41:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:38,392 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:41:38,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:41:38,392 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 19:41:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:38,393 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:41:38,394 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:41:38,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:41:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:41:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:41:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:41:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:41:38,402 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-23 19:41:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:38,403 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:41:38,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:41:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:41:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:41:38,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:38,404 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-23 19:41:38,404 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:38,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-23 19:41:38,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:38,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:38,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:38,412 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:38,412 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:38,412 INFO L227 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 [2018-09-23 19:41:38,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:38,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:40,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:40,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-09-23 19:41:40,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:41:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:41:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:41:40,353 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-23 19:41:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:42,575 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 19:41:42,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:41:42,575 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 19:41:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:42,576 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:41:42,577 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:41:42,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:41:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:41:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:41:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:41:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-23 19:41:42,585 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-23 19:41:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:42,585 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-23 19:41:42,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:41:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-23 19:41:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:41:42,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:42,586 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-23 19:41:42,586 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:42,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-23 19:41:42,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:42,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:42,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,594 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:42,595 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:42,595 INFO L227 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 [2018-09-23 19:41:42,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:42,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:42,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:42,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:44,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:44,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-09-23 19:41:44,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:41:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:41:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:41:44,792 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-23 19:41:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:47,178 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 19:41:47,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:41:47,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 19:41:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:47,179 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:41:47,179 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:41:47,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:41:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:41:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:41:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:41:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-23 19:41:47,188 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-23 19:41:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:47,188 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-23 19:41:47,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:41:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-23 19:41:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:41:47,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:47,189 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-23 19:41:47,189 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:47,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-23 19:41:47,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:47,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:47,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:47,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:47,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:47,197 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:41:47,197 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:41:47,197 INFO L227 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) [2018-09-23 19:41:47,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:41:55,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:41:55,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:55,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:58,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:41:58,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-09-23 19:41:58,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:41:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:41:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:41:58,093 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-23 19:42:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:00,618 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 19:42:00,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:42:00,619 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 19:42:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:00,620 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:42:00,620 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:42:00,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:42:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:42:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:42:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:42:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-23 19:42:00,626 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-23 19:42:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:00,627 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-23 19:42:00,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:42:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-23 19:42:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:42:00,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:00,627 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-23 19:42:00,627 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:00,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-23 19:42:00,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:00,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:00,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:00,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:00,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:00,635 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:00,635 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:00,636 INFO L227 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 [2018-09-23 19:42:00,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:00,798 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:00,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:00,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:02,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:02,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-09-23 19:42:02,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:42:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:42:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:42:02,682 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-23 19:42:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:05,186 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 19:42:05,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:42:05,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-23 19:42:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:05,187 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:42:05,187 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:42:05,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:42:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:42:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:42:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:42:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-23 19:42:05,195 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-23 19:42:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:05,195 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-23 19:42:05,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:42:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-23 19:42:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:42:05,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:05,196 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-23 19:42:05,196 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:05,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-23 19:42:05,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:05,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:05,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:05,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:05,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:05,205 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:05,205 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:05,205 INFO L227 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 [2018-09-23 19:42:05,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:05,457 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:42:05,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:05,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:07,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:07,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-09-23 19:42:07,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:42:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:42:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:42:07,276 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-23 19:42:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:10,520 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 19:42:10,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:42:10,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-23 19:42:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:10,521 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:42:10,521 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:42:10,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:42:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:42:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:42:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:42:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-23 19:42:10,527 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-23 19:42:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:10,527 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-23 19:42:10,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:42:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-23 19:42:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:42:10,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:10,528 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-23 19:42:10,528 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:10,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-23 19:42:10,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:10,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:10,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:10,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:10,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:10,536 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:10,536 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:10,536 INFO L227 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 [2018-09-23 19:42:10,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:12,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:42:12,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:12,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:14,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:14,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-09-23 19:42:14,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:42:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:42:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:42:14,213 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-23 19:42:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:17,221 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 19:42:17,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:42:17,221 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-23 19:42:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:17,222 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:42:17,222 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:42:17,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:42:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:42:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:42:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:42:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-23 19:42:17,230 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-23 19:42:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:17,230 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-23 19:42:17,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:42:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-23 19:42:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:42:17,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:17,231 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-23 19:42:17,232 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:17,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-23 19:42:17,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:17,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:17,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:17,240 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:17,240 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:17,240 INFO L227 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 [2018-09-23 19:42:17,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:17,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:19,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:19,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-09-23 19:42:19,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:42:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:42:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:42:19,350 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-23 19:42:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:22,967 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 19:42:22,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:42:22,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-23 19:42:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:22,968 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:42:22,969 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:42:22,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:42:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:42:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:42:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:42:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-23 19:42:22,977 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-23 19:42:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:22,978 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-23 19:42:22,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:42:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-23 19:42:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:42:22,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:22,979 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-23 19:42:22,979 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:22,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-23 19:42:22,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:22,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:22,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:22,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:22,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:22,988 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:22,988 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:22,988 INFO L227 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 [2018-09-23 19:42:23,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:42:23,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:42:23,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:23,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:25,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:25,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-09-23 19:42:25,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:42:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:42:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:42:25,166 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-23 19:42:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:28,921 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 19:42:28,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:42:28,921 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-23 19:42:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:28,922 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:42:28,922 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:42:28,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:42:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:42:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:42:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:42:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-23 19:42:28,932 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-23 19:42:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:28,932 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-23 19:42:28,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:42:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-23 19:42:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:42:28,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:28,933 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-23 19:42:28,933 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:28,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-23 19:42:28,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:28,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:28,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:28,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:28,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:28,943 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:28,943 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:28,943 INFO L227 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 [2018-09-23 19:42:28,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:42:42,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:42:42,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:42,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:44,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:44,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-09-23 19:42:44,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:42:44,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:42:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:42:44,263 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-23 19:42:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:47,261 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 19:42:47,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:42:47,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-23 19:42:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:47,262 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:42:47,262 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:42:47,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:42:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:42:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:42:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:42:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-23 19:42:47,269 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-23 19:42:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:47,270 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-23 19:42:47,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:42:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-23 19:42:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:42:47,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:47,271 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-23 19:42:47,271 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:47,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-23 19:42:47,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:47,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:47,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:47,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:47,280 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:47,280 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:47,280 INFO L227 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 [2018-09-23 19:42:47,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:47,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:47,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:47,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:49,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:49,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-09-23 19:42:49,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:42:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:42:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:42:49,831 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-23 19:42:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:53,422 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 19:42:53,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:42:53,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-23 19:42:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:53,424 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:42:53,424 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:42:53,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:42:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:42:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:42:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:42:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-23 19:42:53,433 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-23 19:42:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:53,433 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-23 19:42:53,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:42:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-23 19:42:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:42:53,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:53,434 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-23 19:42:53,434 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:53,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-23 19:42:53,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:53,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:53,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:53,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:53,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:53,442 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:53,442 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:53,442 INFO L227 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 [2018-09-23 19:42:53,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:53,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:42:53,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:53,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:56,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:42:56,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-09-23 19:42:56,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:42:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:42:56,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:42:56,041 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-23 19:42:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:59,243 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 19:42:59,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:42:59,244 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-23 19:42:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:59,245 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:42:59,245 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:42:59,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:42:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:42:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:42:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:42:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-23 19:42:59,252 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-23 19:42:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:59,252 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-23 19:42:59,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:42:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-23 19:42:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:42:59,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:59,253 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-23 19:42:59,253 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:59,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-23 19:42:59,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:59,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:59,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:59,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:59,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:59,261 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:42:59,262 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:42:59,262 INFO L227 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 [2018-09-23 19:42:59,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:43:00,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:43:00,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:00,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:03,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:03,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-09-23 19:43:03,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:43:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:43:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:43:03,171 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-23 19:43:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:06,361 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 19:43:06,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:43:06,362 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-23 19:43:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:06,363 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:43:06,363 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:43:06,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:43:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:43:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:43:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:43:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-23 19:43:06,373 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-23 19:43:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:06,374 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-23 19:43:06,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:43:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-23 19:43:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:43:06,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:06,374 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-23 19:43:06,375 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:06,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-23 19:43:06,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:06,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:06,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:06,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:06,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:06,383 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:43:06,383 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:43:06,383 INFO L227 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 [2018-09-23 19:43:06,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:43:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:06,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:09,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:09,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-09-23 19:43:09,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:43:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:43:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:43:09,047 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-23 19:43:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:12,532 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 19:43:12,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:43:12,532 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-23 19:43:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:12,533 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:43:12,534 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:43:12,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:43:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:43:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:43:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:43:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-23 19:43:12,541 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-23 19:43:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:12,541 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-23 19:43:12,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:43:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-23 19:43:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:43:12,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:12,542 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-23 19:43:12,542 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:12,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-23 19:43:12,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:12,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:12,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:12,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:43:12,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:12,549 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:43:12,549 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:43:12,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:43:12,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:43:12,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:43:12,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:12,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:15,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:15,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-09-23 19:43:15,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:43:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:43:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:43:15,143 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-23 19:43:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:19,422 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 19:43:19,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:43:19,422 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-23 19:43:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:19,424 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:43:19,424 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:43:19,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:43:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:43:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:43:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:43:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-23 19:43:19,430 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-23 19:43:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:19,431 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-23 19:43:19,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:43:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-23 19:43:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:43:19,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:19,432 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-23 19:43:19,432 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:19,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-23 19:43:19,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:19,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:19,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:19,441 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:43:19,441 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:43:19,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:43:19,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:43:39,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:43:39,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:39,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:42,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:42,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-09-23 19:43:42,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:43:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:43:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:43:42,247 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-23 19:43:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:46,743 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 19:43:46,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:43:46,744 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-23 19:43:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:46,745 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:43:46,745 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:43:46,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:43:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:43:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:43:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:43:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-23 19:43:46,752 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-23 19:43:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:46,753 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-23 19:43:46,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:43:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-23 19:43:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:43:46,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:46,753 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-23 19:43:46,754 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:46,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-23 19:43:46,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:46,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:46,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:46,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:46,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:46,763 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:43:46,763 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:43:46,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:43:46,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:43:47,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:43:47,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:47,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:49,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:49,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-09-23 19:43:49,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:43:49,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:43:49,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:43:49,826 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-23 19:43:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:54,465 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 19:43:54,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:43:54,465 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-23 19:43:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:54,467 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:43:54,467 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:43:54,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:43:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:43:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:43:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:43:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-23 19:43:54,474 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-23 19:43:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:54,475 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-23 19:43:54,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:43:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-23 19:43:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:43:54,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:54,476 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-23 19:43:54,476 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:54,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-23 19:43:54,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:54,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:54,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:54,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:54,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:54,485 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:43:54,485 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:43:54,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:43:54,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:43:54,923 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:43:54,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:54,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:57,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:43:57,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-09-23 19:43:57,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:43:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:43:57,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:43:57,470 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. Received shutdown request... [2018-09-23 19:44:00,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:44:00,412 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:44:00,419 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:44:00,419 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:44:00 BoogieIcfgContainer [2018-09-23 19:44:00,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:44:00,420 INFO L168 Benchmark]: Toolchain (without parser) took 255323.81 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 32.0 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -56.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:44:00,422 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:44:00,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:44:00,423 INFO L168 Benchmark]: Boogie Preprocessor took 21.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:44:00,423 INFO L168 Benchmark]: RCFGBuilder took 282.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:44:00,423 INFO L168 Benchmark]: TraceAbstraction took 254968.37 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 32.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -77.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:44:00,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 282.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254968.37 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 32.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -77.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (147states) and FLOYD_HOARE automaton (currently 57 states, 74 states before enhancement), while ReachableStatesComputation was computing reachable states (109 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 254.8s OverallTime, 72 OverallIterations, 72 TraceHistogramMax, 102.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2824 SDtfs, 0 SDslu, 125671 SDs, 0 SdLazy, 130907 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5328 GetRequests, 2700 SyntacticMatches, 0 SemanticMatches, 2628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 71 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 65.0s SatisfiabilityAnalysisTime, 82.3s InterpolantComputationTime, 5400 NumberOfCodeBlocks, 5400 NumberOfCodeBlocksAsserted, 1380 NumberOfCheckSat, 5328 ConstructedInterpolants, 0 QuantifiedInterpolants, 3633940 SizeOfPredicates, 357 NumberOfNonLiveVariables, 16704 ConjunctsInSsa, 11008 ConjunctsInUnsatCore, 72 InterpolantComputations, 1 PerfectInterpolantSequences, 0/124392 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-44-00-435.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-44-00-435.csv Completed graceful shutdown